refactor: update VaultTools to pass adapters to utils

Updated VaultTools to use adapters for all utility method calls:
- SearchUtils.searchWaypoints() now receives vault adapter
- WaypointUtils.isFolderNote() now receives vault adapter
- LinkUtils.validateWikilinks() now receives vault and metadata adapters
- LinkUtils.resolveLink() now receives vault and metadata adapters
- LinkUtils.getBacklinks() now receives vault and metadata adapters

Removed App dependency from VaultTools constructor - now only requires
vault and metadata adapters. Updated factory and all test files accordingly.

All tests passing (336/336).

src/tools/vault-tools-factory.ts

@@ -9,7 +9,6 @@ import { MetadataCacheAdapter } from '../adapters/metadata-adapter';
 export function createVaultTools(app: App): VaultTools {
 	return new VaultTools(
 		new VaultAdapter(app.vault),
-		new MetadataCacheAdapter(app.metadataCache),
-		app
+		new MetadataCacheAdapter(app.metadataCache)
 	);
 }