feat: initial tictactoe web app with CI/CD pipeline

- Express app serving vanilla JS 2-player TicTacToe game
- Dockerfile (multi-stage node:18-slim)
- Jenkinsfile (K8s pod: test → Harbor push → Helm bump → Gitea push)
- Helm chart v1.0.0 with HTTPRoute for tictactoe.fireflylab.local

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -0,0 +1,17 @@
+{
+  "name": "tictactoe",
+  "version": "1.0.0",
+  "description": "TicTacToe web game",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "jest"
+  },
+  "dependencies": {
+    "express": "^4.18.2"
+  },
+  "devDependencies": {
+    "jest": "^29.5.0",
+    "supertest": "^6.3.3"
+  }
+}