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

package-lock.json

@@ -14,8 +14,6 @@
         "p-limit": "^7.3.0",
         "picocolors": "^1.1.1",
         "tree-sitter": "^0.21.0",
-        "tree-sitter-go": "^0.25.0",
-        "tree-sitter-python": "^0.25.0",
         "tree-sitter-typescript": "^0.21.0"
       },
       "bin": {
@@ -3355,44 +3353,6 @@
         "node-gyp-build": "^4.8.0"
       }
     },
-    "node_modules/tree-sitter-go": {
-      "version": "0.25.0",
-      "resolved": "https://registry.npmjs.org/tree-sitter-go/-/tree-sitter-go-0.25.0.tgz",
-      "integrity": "sha512-APBc/Dq3xz/e35Xpkhb1blu5UgW+2E3RyGWawZSCNcbGwa7jhSQPS8KsUupuzBla8PCo8+lz9W/JDJjmfRa2tw==",
-      "hasInstallScript": true,
-      "license": "MIT",
-      "dependencies": {
-        "node-addon-api": "^8.3.1",
-        "node-gyp-build": "^4.8.4"
-      },
-      "peerDependencies": {
-        "tree-sitter": "^0.25.0"
-      },
-      "peerDependenciesMeta": {
-        "tree-sitter": {
-          "optional": true
-        }
-      }
-    },
-    "node_modules/tree-sitter-python": {
-      "version": "0.25.0",
-      "resolved": "https://registry.npmjs.org/tree-sitter-python/-/tree-sitter-python-0.25.0.tgz",
-      "integrity": "sha512-eCmJx6zQa35GxaCtQD+wXHOhYqBxEL+bp71W/s3fcDMu06MrtzkVXR437dRrCrbrDbyLuUDJpAgycs7ncngLXw==",
-      "hasInstallScript": true,
-      "license": "MIT",
-      "dependencies": {
-        "node-addon-api": "^8.5.0",
-        "node-gyp-build": "^4.8.4"
-      },
-      "peerDependencies": {
-        "tree-sitter": "^0.25.0"
-      },
-      "peerDependenciesMeta": {
-        "tree-sitter": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/tree-sitter-typescript": {
       "version": "0.21.2",
       "resolved": "https://registry.npmjs.org/tree-sitter-typescript/-/tree-sitter-typescript-0.21.2.tgz",