chore: Add environment configuration template and clean up utility scripts

- Add .env.example with comprehensive configuration documentation for database, authentication, storage, and node settings
- Update .gitignore to explicitly track .env.example while excluding all .env variants
- Add IDE configuration directories (.vscode/, .kiro/) to .gitignore
- Remove clear_bots.ts and inspect_bots.ts utility scripts that are no longer needed
- Improve environment setup experience for new developers by providing a clear template with all required and optional configuration options

.gitignore

@@ -31,7 +31,13 @@ yarn-error.log*
 .pnpm-debug.log*
 
 # env files (can opt-in for committing if needed)
-.env*
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+# Keep .env.example tracked
+!.env.example
 
 # vercel
 .vercel
@@ -42,3 +48,7 @@ next-env.d.ts
 
 # uploads
 /public/uploads/
+
+# IDE
+.vscode/
+.kiro/