Add Mode1Svelte - independent copy of Mode1 for future SvelteKit integration

- Created Mode1Svelte as complete standalone project
- Identical to Mode1 currently (Hono backend + Vite frontend)
- Separate auth-module copy (no dependencies on Mode1)
- Updated orchestrator to default to Mode1Svelte
- Both Mode1 and Mode1Svelte are independent and interchangeable via ModeSwitch
- Ready for gradual Svelte/SvelteKit migration while maintaining API compatibility

Mode1Svelte/frontend/auth.ts

@@ -0,0 +1,3 @@
+// Frontend entry point - exports auth module for browser
+export { PocketBaseAuth, initPocketBaseAuth } from '../auth-module/frontend';
+export type { AuthConfig, AuthState, AuthCallbacks } from '../auth-module/types';