feat(templates): avanterules filetype support (closes #254) (#466)

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/templates/editing.avanterules

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+{% extends "planning.avanterules" %}
+{% block user_prompt %}
+Your task is to modify the provided code according to the user's request. Follow these instructions precisely:
+
+1. Return ONLY the complete modified code.
+
+2. Do not include any explanations, comments, or line numbers in your response.
+
+3. Ensure the returned code is complete and can be directly used as a replacement for the original code.
+
+4. Preserve the original structure, indentation, and formatting of the code as much as possible.
+
+5. Do not omit any parts of the code, even if they are unchanged.
+
+6. Maintain the SAME indentation in the returned code as in the source code
+
+7. DO NOT include three backticks: {%raw%}```{%endraw%} in your suggestion. Treat the suggested code AS IS.
+
+8. Only return the new code snippets to be updated, DO NOT return the entire file content.
+
+Remember that Your response SHOULD CONTAIN ONLY THE MODIFIED CODE to be used as DIRECT REPLACEMENT to the original file.
+{% endblock %}

lua/avante/templates/planning.avanterules

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+{# Uses https://mitsuhiko.github.io/minijinja-playground/ for testing:
+{
+  "ask": true,
+  "use_xml_format": true,
+  "question": "Refactor to include tab flow",
+  "code_lang": "lua",
+  "file_content": "local Config = require('avante.config')"
+}
+#}
+{%- if use_xml_format -%}
+{%- if selected_code -%}
+<context>
+```{{code_lang}}
+{{file_content}}
+```
+</context>
+
+<code>
+```{{code_lang}}
+{{selected_code}}
+```
+</code>
+{%- else -%}
+<code>
+```{{code_lang}}
+{{file_content}}
+```
+</code>
+{%- endif %}{%- if project_context -%}
+<project_context>
+{{project_context}}
+</project_context>
+{%- endif %}{%- if memory_context -%}
+<memory_context>
+{{memory_context}}
+</memory_context>
+{%- endif %}
+{% else %}
+{%- if selected_code -%}
+CONTEXT:
+```{{code_lang}}
+{{file_content}}
+```
+
+CODE:
+```{{code_lang}}
+{{selected_code}}
+```
+{%- else -%}
+CODE:
+```{{code_lang}}
+{{file_content}}
+```
+{%- endif %}{%- if project_context -%}
+PROJECT CONTEXT:
+{{project_context}}
+{%- endif %}{%- if memory_context -%}
+MEMORY CONTEXT:
+{{memory_context}}
+{%- endif %}{%- endif %}{%- if ask %}
+{%- if not use_xml_format %}
+
+INSTRUCTION: {% else %}
+<instruction>{% endif -%}
+{% block user_prompt %}
+Your primary task is to suggest code modifications with precise line number ranges. Follow these instructions meticulously:
+
+1. Carefully analyze the original code, paying close attention to its structure and line numbers. Line numbers start from 1 and include ALL lines, even empty ones.
+
+2. When suggesting modifications:
+  a. Use the language in the question to reply. If there are non-English parts in the question, use the language of those parts.
+  b. Explain why the change is necessary or beneficial.
+  c. If an image is provided, make sure to use the image in conjunction with the code snippet.
+  d. Provide the exact code snippet to be replaced using this format:
+{% raw %}
+Replace lines: {{start_line}}-{{end_line}}
+```{{language}}
+{{suggested_code}}
+```
+{% endraw %}
+3. Crucial guidelines for suggested code snippets:
+  - The content regarding line numbers MUST strictly follow the format "Replace lines: {{start_line}}-{{end_line}}". Do not be lazy!
+  - Only apply the change(s) suggested by the most recent assistant message (before your generation).
+  - Do not make any unrelated changes to the code.
+  - Produce a valid full rewrite of the entire original file without skipping any lines. Do not be lazy!
+  - Do not arbitrarily delete pre-existing comments/empty Lines.
+  - Do not omit large parts of the original file for no reason.
+  - Do not omit any needed changes from the requisite messages/code blocks.
+  - If there is a clicked code block, bias towards just applying that (and applying other changes implied).
+  - Please keep your suggested code changes minimal, and do not include irrelevant lines in the code snippet.
+  - Maintain the SAME indentation in the returned code as in the source code
+
+4. Crucial guidelines for line numbers:
+  - The range {{start_line}}-{{end_line}} is INCLUSIVE. Both start_line and end_line are included in the replacement.
+  - Count EVERY line, including empty lines and comments lines, comments. Do not be lazy!
+  - Use the same number for start and end lines for single-line changes.
+  - For multi-line changes, ensure the range covers ALL affected lines, from first to last.
+  - Double-check that your line numbers align perfectly with the original code structure.
+
+5. Final check:
+  - Review all suggestions, ensuring each line number is correct, especially the start_line and end_line.
+  - Confirm that no unrelated code is accidentally modified or deleted.
+  - Verify that the start_line and end_line correctly include all intended lines for replacement.
+  - Perform a final alignment check to ensure your line numbers haven't shifted, especially the start_line.
+  - Double-check that your line numbers align perfectly with the original code structure.
+  - DO NOT return the complete modified code with applied changes!
+
+Remember that ACCURATE line numbers are CRITICAL. The range {%raw%}{{start_line}}{%endraw%} to {%raw%}{{end_line}}{%endraw%} must include ALL LINES to be replaced. Double-check ALL RANGES before finalizing your response, and MAKE SURE THAT {%raw%}{{start_line}}{%endraw%} hasn't been shifted down. ENSURE line numbers MATCH the original code structure and indentation ARE PRESERVED.
+{% endblock %}
+{%- if use_xml_format -%}
+</instruction>
+
+<question>{{question}}</question>
+{%- else %}
+QUESTION:
+{{question}}
+{%- endif %}
+{% else %}
+{% if use_xml_format -%}
+<question>{{question}}</question>
+{% else %}
+QUESTION:
+{{question}}
+{%- endif %}
+{%- endif %}

lua/avante/templates/suggesting.avanterules

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+{% extends "planning.avanterules" %}
+{% block user_prompt %}
+Your task is to suggest code modifications at the cursor position. Follow these instructions meticulously:
+
+1. Carefully analyze the original code, paying close attention to its structure and the cursor position.
+
+2. You must follow this json format when suggesting modifications:
+
+{% raw %}
+[
+  {
+    "row": ${row},
+    "col": ${column},
+    "content": "Your suggested code here"
+  }
+]
+{% endraw %}
+
+3. When suggesting suggested code:
+  - Each element in the returned list is a COMPLETE and INDEPENDENT code snippet.
+  - MUST be a valid json format. Don't be lazy!
+  - Only return the new code to be inserted.
+  - Your returned code should not overlap with the original code in any way. Don't be lazy!
+  - Please strictly check the code around the position and ensure that the complete code after insertion is correct. Don't be lazy!
+  - Do not return the entire file content or any surrounding code.
+  - Do not include any explanations, comments, or line numbers in your response.
+  - Ensure the suggested code fits seamlessly with the existing code structure and indentation.
+  - If there are no recommended modifications, return an empty list.
+
+Remember to ONLY RETURN the suggested code snippet, without any additional formatting or explanation.
+{% endblock %}
+