chore(git): add .gitignore and untrack build artifacts (dist, node_modules)

.gitignore

@@ -0,0 +1,49 @@
+# Root
+.env
+.env.*
+*.local
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+.eslintcache
+.DS_Store
+Thumbs.db
+.idea/
+.vscode/
+
+# Node / Frontend
+node_modules/
+**/node_modules/
+dist/
+**/dist/
+build/
+.cache/
+.parcel-cache/
+.turbo/
+.vite/
+
+# Coverage / reports
+coverage/
+**/coverage/
+.nyc_output/
+
+# Docker / runtime
+*.pid
+*.seed
+*.sqlite
+*.log*
+tmp/
+
+# Misc framework outputs (safe if not present)
+.next/
+.nuxt/
+.vercel/
+.svelte-kit/
+.angular/
+
+# Editor backups
+*~
+*.swp
+*.swc