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

.gitignore

@@ -24,3 +24,12 @@ vagrant/dev/ubuntu/ansible/ansible_inventory.ini
 *.cast
 vagrant/dev/ubuntu/certs/
 vagrant/dev/ubuntu/config-dev
+.terraform*
+registry*.json*
+terraform.tfstate**
+*history*.txt
+*.tfvars
+gcloud/tf/.env
+gcloud/tf/k3s/forgejo/issuer.yaml
+gcloud/tf/k3s/forgejo/ingress.yaml
+.env