feat: Add and refactor MIME type management

- Added BaseModel with fillable attributes and mergeFillableAttributes method
- Refactored MimeType model to extend BaseModel
- Implemented destroy method in MimetypeController for deleting MIME types
- Updated Create.vue component with refactoring and improved type safety
- Fixed issues with ref usage in Create.vue
- Updated routes to include new and refactored endpoints

app/models/base_model.ts

@@ -1,3 +1,4 @@
+// import { BaseModel as LucidBaseModel } from '@adonisjs/lucid/orm';
 import { BaseModel as LucidBaseModel } from '@adonisjs/lucid/orm';
 // import { ManyToManyQueryClient } from '@ioc:Adonis/Lucid/Orm';
 
@@ -29,8 +30,9 @@ export default class BaseModel extends LucidBaseModel {
      */
     // private fillInvoked: boolean = false;
 
-    [key: string]: any;
+    // [key: string]: any;
     
+
     public static fillable: string[] = [];
 
     public fill(attributes: any, allowExtraProperties: boolean = false): this {

app/models/traits/dataset_extension.ts

@@ -36,7 +36,7 @@ export default abstract class DatasetExtension extends LucidBaseModel {
     // which fields shoud#t be published
     protected internalFields: Record<string, any> = {};
     protected fields: Record<string, any> = {};
-    [key: string]: any;
+    // [key: string]: any;
 
     private getExternalFields(): Record<string, any> {
         // External fields definition