Add Kaniko build automation for resume-site

- Namespace for resume-site resources
- Build trigger CronJob (runs every 5 minutes)
- Kaniko-based image builds to Harbor
- RBAC for build job creation
- PVC for tracking last commit

Follows same pattern as neon-vortex

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

k8s/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: resume-site