Replace dotenv with dotenvx as dev dependency

- Remove dotenv from production dependencies
- Add @dotenvx/dotenvx as dev dependency for local development
- Delete src/local.ts (no longer needed)
- Update program.ts to import directly from index.js

This eliminates dotenv from the bundle entirely, making the codebase
fully V8-compatible for Smithery deployment.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Author: kamath

package.json

@@ -50,10 +50,10 @@
     "@mcp-ui/server": "^5.10.0",
     "@modelcontextprotocol/sdk": "^1.13.1",
     "commander": "^14.0.0",
-    "dotenv": "^16.4.6",
     "zod": "^3.25.67"
   },
   "devDependencies": {
+    "@dotenvx/dotenvx": "^1.34.0",
     "@changesets/cli": "^2.29.6",
     "@eslint/js": "^9.29.0",
     "@smithery/cli": "^3.1.2",