Add Google Cloud K3s infrastructure support

- Add Terraform configuration for GCP instance and storage
- Add startup script for K3s installation and configuration
- Add pipeline scripts for deployment and management
- Add Forgejo deployment manifests and configuration

gcloud/tf/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.12-slim
+
+# Install dependencies
+RUN pip install --no-cache-dir gunicorn httpbin
+
+# Expose the application port
+EXPOSE 80
+
+# Launch the application
+CMD ["gunicorn", "-b", "0.0.0.0:80", "httpbin:app"]