feat: add reusable CI/CD pipeline templates

Reusable Gitea Actions workflows for lint, test, build, and deploy:
- lint-python, lint-node, lint-rust
- test-python, test-node, test-rust
- build-push (Docker build + push to Gitea registry)
- deploy-k8s (GitOps image tag update in cluster repo)

Plus example caller workflows for python-fullstack, rust-service,
and node-frontend stacks. Branch refs aligned to staging per CON-570 standards.

examples/node-frontend/ci.yml

@@ -0,0 +1,24 @@
+# Example CI workflow for a Node.js/TypeScript frontend service (e.g. clok1-landing)
+# Place in your repo at: .gitea/workflows/ci.yml
+name: CI
+
+on:
+  pull_request:
+    branches: [main, staging]
+  push:
+    branches: [main, staging]
+
+concurrency:
+  group: ci-${{ gitea.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    uses: wectrl-net/ci-templates/.gitea/workflows/lint-node.yaml@main
+    with:
+      node-version: "22"
+
+  test:
+    uses: wectrl-net/ci-templates/.gitea/workflows/test-node.yaml@main
+    with:
+      node-version: "22"