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/src/app.d.ts

@@ -0,0 +1,13 @@
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+	namespace App {
+		// interface Error {}
+		// interface Locals {}
+		// interface PageData {}
+		// interface PageState {}
+		// interface Platform {}
+	}
+}
+
+export {};