feat(frontend): add Vue 3 web application

- Add Vue 3 + TypeScript + Pinia setup
- Add 6 complete views: Dashboard, Queue, Scanner, Rules, Workers, Settings
- Add Pinia stores for state management
- Add API service with Axios client
- Add dark theme with Tdarr-inspired styling
- Add setup wizard component
- Add path browser for filesystem navigation

frontend/.gitignore

@@ -0,0 +1,25 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+