feat: enhance user management, mimetype creation, and validation

- **AdminuserController.ts**: enable editing `first_name` and `last_name` for user creation and updates
- **MimetypeController.ts**: add creation support for mimetypes with selectable extensions
- **Models**: add `Mimetype` model (mime_type.ts); add `SnakeCaseNamingStrategy` for User model
- **Validators**:
  - **updateDatasetValidator**: increase title length to 255 and description length to 2500
  - **User Validators**: refine `createUserValidator` and `updateUserValidator` to include `first_name` and `last_name`
- **vanilla_error_reporter**: improve error reporting for wildcard fields
- **SKOS Query**: refine keyword request in `SearchCategoryAutocomplete.vue`
- **UI Enhancements**:
  - improve icon design in wizard (Wizard.vue)
  - add components for mimetype creation (Create.vue and button in Index.vue)
- **Routes**: update `routes.ts` to include new AdonisJS routes

app/Controllers/Http/Admin/AdminuserController.ts

@@ -85,7 +85,7 @@ export default class AdminuserController {
             // return response.badRequest(error.messages);
             throw error;
         }
-        const input = request.only(['login', 'email', 'password']);
+        const input = request.only(['login', 'email', 'password', 'first_name', 'last_name']);
         const user = await User.create(input);
         if (request.input('roles')) {
             const roles: Array<number> = request.input('roles');
@@ -141,9 +141,9 @@ export default class AdminuserController {
         // password is optional
         let input;
         if (request.input('password')) {
-            input = request.only(['login', 'email', 'password']);
+            input = request.only(['login', 'email', 'password', 'first_name', 'last_name']);
         } else {
-            input = request.only(['login', 'email']);
+            input = request.only(['login', 'email', 'first_name', 'last_name']);
         }
         await user.merge(input).save();
         // await user.save();