chore: bootstrap repository tooling

Add npm and Bun dependency metadata.

Configure TypeScript and shared editor defaults.

Ignore dependencies, build output, caches, logs, and local files.

.gitignore

@@ -0,0 +1,36 @@
+# Dependencies
+node_modules/
+
+# Build output and caches
+dist/
+coverage/
+.cache/
+.vite/
+*.tsbuildinfo
+
+# Local environment files
+.env
+.env.*
+!.env.example
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Local reference data
+.base-ui-official/
+
+# Editors
+.idea/
+.vscode/
+*.swp
+*.swo
+.zed/*
+!.zed/settings.json
+
+# Operating system files
+.DS_Store
+Thumbs.db