add opencode

Author: yrlu

.github/workflows/opencode.yml

@@ -28,6 +28,7 @@ jobs:
       - name: Run opencode
         uses: anomalyco/opencode/github@latest
         env:
-          OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
+          GOOGLE_GENERATIVE_AI_API_KEY: ${{ secrets.GOOGLE_GENERATIVE_AI_API_KEY }}
+          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
         with:
-          model: opencode/gemini-3-flash
+          model: google/gemini-3-flash-preview