feat: add glob llm tool (#1495)

lua/avante/llm_tools.lua

@@ -38,6 +38,16 @@ local function has_permission_to_access(abs_path)
   return not Utils.is_ignored(rel_path, gitignore_patterns, gitignore_negate_patterns)
 end
 
+---@type AvanteLLMToolFunc<{ rel_path: string, pattern: string }>
+function M.glob(opts, on_log)
+  local abs_path = get_abs_path(opts.rel_path)
+  if not has_permission_to_access(abs_path) then return "", "No permission to access path: " .. abs_path end
+  if on_log then on_log("path: " .. abs_path) end
+  if on_log then on_log("pattern: " .. opts.pattern) end
+  local files = vim.fn.glob(abs_path .. "/" .. opts.pattern, true, true)
+  return vim.json.encode(files), nil
+end
+
 ---@type AvanteLLMToolFunc<{ rel_path: string, max_depth?: integer }>
 function M.list_files(opts, on_log)
   local abs_path = get_abs_path(opts.rel_path)
@@ -613,6 +623,38 @@ end
 
 ---@type AvanteLLMTool[]
 M._tools = {
+  {
+    name = "glob",
+    description = 'Fast file pattern matching using glob patterns like "**/*.js"',
+    param = {
+      type = "table",
+      fields = {
+        {
+          name = "pattern",
+          description = "Glob pattern",
+          type = "string",
+        },
+        {
+          name = "rel_path",
+          description = "Relative path to the directory, as cwd",
+          type = "string",
+        },
+      },
+    },
+    returns = {
+      {
+        name = "matches",
+        description = "List of matched files",
+        type = "string",
+      },
+      {
+        name = "err",
+        description = "Error message",
+        type = "string",
+        optional = true,
+      },
+    },
+  },
   {
     name = "rag_search",
     enabled = function() return Config.rag_service.enabled and RagService.is_ready() end,
@@ -643,7 +685,7 @@ M._tools = {
   },
   {
     name = "python",
-    description = "Run python code",
+    description = "Run python code. Can't use it to read files or modify files.",
     param = {
       type = "table",
       fields = {
@@ -858,7 +900,7 @@ M._tools = {
   },
   {
     name = "read_file",
-    description = "Read the contents of a file",
+    description = "Read the contents of a file. If the file content is already in the context, do not use this tool.",
     param = {
       type = "table",
       fields = {
@@ -1057,7 +1099,7 @@ M._tools = {
   },
   {
     name = "bash",
-    description = "Run a bash command in a directory",
+    description = "Run a bash command in a directory. Can't use search commands like find/grep or read tools like cat/ls.",
     param = {
       type = "table",
       fields = {