fix: bundle extension with esbuild to avoid pnpm/vsce conflicts

vsce's npm list validation doesn't work with pnpm's node_modules structure. Solution: bundle everything with esbuild into a single file. This also reduces package size by excluding node_modules entirely.

- Add bundle script using esbuild
- Update vscode:prepublish to use bundle instead of compile
- Exclude node_modules from .vscodeignore
- Keep --no-dependencies flag since everything is bundled

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: AlexStrNik

.vscodeignore

@@ -16,3 +16,4 @@ tests/**
 buf.gen.yaml
 pnpm-lock.yaml
 .DS_Store
+node_modules/**

package.json

@@ -45,8 +45,9 @@
     }
   },
   "scripts": {
-    "vscode:prepublish": "pnpm run compile",
+    "vscode:prepublish": "pnpm run bundle",
     "compile": "tsc -p ./",
+    "bundle": "esbuild src/extension.ts --bundle --outfile=out/extension.js --external:vscode --format=cjs --platform=node",
     "watch": "tsc -watch -p ./",
     "pretest": "pnpm run compile && pnpm run lint",
     "lint": "eslint src",