feat: avante repo map rust crate (#628)

crates/avante-repo-map/queries/tree-sitter-cpp-defs.scm

@@ -0,0 +1,11 @@
+;; Capture extern functions, variables, public classes, and methods
+(function_definition
+  (storage_class_specifier) @extern
+) @function
+(class_specifier
+  (public) @class
+  (function_definition) @method
+) @class
+(declaration
+  (storage_class_specifier) @extern
+) @variable