chore(deps): update dependencies and ESLint configuration

- Changed pnpm setting in eslint.config.mjs from true to false.
- Updated various dependencies in package.json to specific versions for better stability and compatibility.
- Removed optionalDependencies from package.json to streamline the dependency management.
- Refactored ai-agent.service.ts to replace ToolInterface with DynamicStructuredTool for improved type safety.

Signed-off-by: Innei <tukon479@gmail.com>

packages/webhook/package.json

@@ -21,7 +21,7 @@
     "build": "node scripts/generate.js && tsup && node scripts/post-build.cjs"
   },
   "devDependencies": {
-    "express": "catalog:"
+    "express": "4.21.2"
   },
   "bump": {
     "before": [
@@ -35,4 +35,4 @@
     "tag": false,
     "commit_message": "chore(release): bump @mx-space/webhook to v${NEW_VERSION}"
   }
-}
+}