feat: portfolio redesign with i18n, RBC project showcase, CI/CD

- Add i18n support (EN/ZH) with language toggle
- Redesign header with education dropdown, contact copy buttons
- Add RBC project showcase with bullet points, skills highlighting
- Create terraform-drift placeholder page
- Add ProjectShowcase component with media toggle (image/video)
- Update experience timeline with action-driven descriptions
- Add Docker + Forgejo CI workflow for image builds
- Update K8s manifests for riotpiao.com ingress
- Add DESIGN.md documenting design system patterns

build.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -euo pipefail
+
+REGISTRY="${REGISTRY:-forgejo.riotpiao.com}"
+IMAGE="${REGISTRY}/rock/portfolio:latest"
+
+echo "Building image: ${IMAGE}"
+docker buildx build --platform linux/amd64 -t "${IMAGE}" .
+
+echo "Pushing image..."
+docker push "${IMAGE}"
+
+echo "✓ Successfully pushed ${IMAGE}"