fix: remove conflicting tree-sitter-go and tree-sitter-python dependencies

These grammars require tree-sitter@^0.25.0 but we use 0.21.1.
They already failed at runtime with try/catch graceful fallback.
Removing them fixes npm peer dependency conflict during pi install.

- Remove tree-sitter-go and tree-sitter-python from dependencies
- ast-extract.ts already handles missing grammars gracefully
- Heuristics + LLM layer cover Go/Python analysis anyway

src/index.ts

@@ -1,5 +1,5 @@
 // Main entry point for pi-project-map skill
-export { initProject } from "./init.js";
+export { initProject, reinitPath } from "./init.js";
 export { patchFile } from "./patch.js";
 export { validateMaps } from "./validate.js";
 export { renderPackageMap, parsePackageMap } from "./format.js";