Add coffee bot lottery poster and schedule

.github/workflows/coffee-bot.yml

@@ -0,0 +1,29 @@
+name: Coffee Bot
+
+on:
+  schedule:
+    - cron: "0 1 * * *"
+  workflow_dispatch:
+
+jobs:
+  run-coffee-bot:
+    environment: Bots
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm install --no-save @openai/agents tsx typescript
+
+      - name: Run coffee bot
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          OPENISLE_TOKEN: ${{ secrets.OPENISLE_TOKEN }}
+        run: npx tsx bots/instance/coffee_bot.ts