feat(migration): implement interactive mapping resolution workflow

- Add SQLite database integration for environments and mappings
- Update TaskManager to support pausing tasks (AWAITING_MAPPING)
- Modify MigrationPlugin to detect missing mappings and wait for resolution
- Add frontend UI for handling missing mappings interactively
- Create dedicated migration routes and API endpoints
- Update .gitignore and project documentation

frontend/.svelte-kit/non-ambient.d.ts

@@ -27,15 +27,17 @@ export {};
 
 declare module "$app/types" {
 	export interface AppTypes {
-		RouteId(): "/" | "/settings";
+		RouteId(): "/" | "/migration" | "/migration/mappings" | "/settings";
 		RouteParams(): {
 			
 		};
 		LayoutParams(): {
 			"/": Record<string, never>;
+			"/migration": Record<string, never>;
+			"/migration/mappings": Record<string, never>;
 			"/settings": Record<string, never>
 		};
-		Pathname(): "/" | "/settings" | "/settings/";
+		Pathname(): "/" | "/migration" | "/migration/" | "/migration/mappings" | "/migration/mappings/" | "/settings" | "/settings/";
 		ResolvedPathname(): `${"" | `/${string}`}${ReturnType<AppTypes['Pathname']>}`;
 		Asset(): string & {};
 	}