Initial commit: SvelteKit PWA + PocketBase Setup für checkflo.de

- Landing Page mit Logo, Hero, Features, Steps, CTA
- QR-Scan Checklisten-Flow (/s/[id])
- PocketBase Client (pb.ts)
- Makefile für DS-Deployment (SSH)
- Setup-Scripts: setup-db.sh, seed-demo.sh

app/.gitignore

@@ -0,0 +1,23 @@
+node_modules
+
+# Output
+.output
+.vercel
+.netlify
+.wrangler
+/.svelte-kit
+/build
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.*
+!.env.example
+!.env.test
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*