feat: implement full-stack TaskPilot scheduler

.gitignore

@@ -0,0 +1,26 @@
+# Rust
+/target/
+/backend/target/
+
+# Frontend
+/frontend/node_modules/
+/frontend/dist/
+/frontend/coverage/
+/frontend/playwright-report/
+/frontend/test-results/
+/.pnpm-store/
+
+# Local configuration and runtime data
+.env
+.env.*
+!.env.example
+/data/
+/logs/
+/.e2e-data/
+/release/
+
+# Editors and operating system files
+/.idea/
+.vscode/
+.DS_Store
+Thumbs.db