feat(tools): add ast-grep tools for AST-aware code search and transformation

- Add ast_grep_search for pattern-based code search (25 languages)
- Add ast_grep_replace for AST-aware code rewriting with dry-run
- Add ast_grep_analyze for in-memory code analysis (NAPI)
- Add ast_grep_transform for in-memory code transformation
- Add ast_grep_languages to list supported languages

src/tools/ast-grep/index.ts

@@ -0,0 +1,23 @@
+import {
+  ast_grep_search,
+  ast_grep_replace,
+  ast_grep_languages,
+  ast_grep_analyze,
+  ast_grep_transform,
+} from "./tools"
+
+export const builtinTools = {
+  ast_grep_search,
+  ast_grep_replace,
+  ast_grep_languages,
+  ast_grep_analyze,
+  ast_grep_transform,
+}
+
+export {
+  ast_grep_search,
+  ast_grep_replace,
+  ast_grep_languages,
+  ast_grep_analyze,
+  ast_grep_transform,
+}