chore: Improve code consistency and readability

Refactored the initialization of `LocalSettings` in `channel.service.ts` to only set the properties that have been explicitly provided. This refactoring improves code consistency and readability. Also, removed the unused `initStoreFolders` method from `repository.service.ts` and its related imports. In addition, updated the import style for `PrismaClient` in `repository.service.ts`.

The modified files are:
- src/api/controllers/instance.controller.ts
- src/api/repository/repository.service.ts
- src/api/services/channel.service.ts
- src/api/services/channels/whatsapp.baileys.service.ts

src/api/controllers/instance.controller.ts

@@ -373,13 +373,13 @@ export class InstanceController {
       }
 
       const settings: wa.LocalSettings = {
-        rejectCall: rejectCall || false,
+        rejectCall: rejectCall === true,
         msgCall: msgCall || '',
-        groupsIgnore: groupsIgnore || true,
-        alwaysOnline: alwaysOnline || false,
-        readMessages: readMessages || false,
-        readStatus: readStatus || false,
-        syncFullHistory: syncFullHistory ?? false,
+        groupsIgnore: groupsIgnore === true,
+        alwaysOnline: alwaysOnline === true,
+        readMessages: readMessages === true,
+        readStatus: readStatus === true,
+        syncFullHistory: syncFullHistory === true,
       };
 
       await this.settingsService.create(instance, settings);