feat: Setup zero-downtime deployments for production and dev branches

- Created separate workflows for production and dev deployments
- Production branch → dk0.dev (port 3000)
- Dev branch → dev.dk0.dev (port 3002)
- Zero-downtime deployment pattern (start new, wait for health, remove old)
- Complete isolation between environments (separate containers, databases, networks)
- Cleaned up unused code and files:
  - Removed unused GhostEditor and ResizableGhostEditor components
  - Removed old/unused workflows and markdown files
  - Fixed docker-compose references
- Upgraded dependencies to latest compatible versions
- Fixed TypeScript errors in editor page
- Updated staging to use dev.dk0.dev domain

docker-compose.staging.yml

@@ -13,7 +13,7 @@ services:
       - NODE_ENV=staging
       - DATABASE_URL=postgresql://portfolio_user:portfolio_staging_pass@postgres-staging:5432/portfolio_staging_db?schema=public
       - REDIS_URL=redis://redis-staging:6379
-      - NEXT_PUBLIC_BASE_URL=${NEXT_PUBLIC_BASE_URL:-https://staging.dk0.dev}
+      - NEXT_PUBLIC_BASE_URL=${NEXT_PUBLIC_BASE_URL:-https://dev.dk0.dev}
       - MY_EMAIL=${MY_EMAIL:-contact@dk0.dev}
       - MY_INFO_EMAIL=${MY_INFO_EMAIL:-info@dk0.dev}
       - MY_PASSWORD=${MY_PASSWORD}