refactor: new prompts structure (#1071)

lua/avante/templates/base.avanterules

@@ -0,0 +1,14 @@
+{# 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')"
+}
+#}
+Act as an expert software developer.
+Always use best practices when coding.
+Respect and use existing conventions, libraries, etc that are already present in the code base.
+{% block extra_prompt %}
+{% endblock %}