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/validators/dataset.ts

@@ -164,7 +164,7 @@ export const updateDatasetValidator = vine.compile(
         titles: vine
             .array(
                 vine.object({
-                    value: vine.string().trim().minLength(3).maxLength(2500),
+                    value: vine.string().trim().minLength(3).maxLength(255),
                     type: vine.enum(Object.values(TitleTypes)),
                     language: vine
                         .string()
@@ -178,7 +178,7 @@ export const updateDatasetValidator = vine.compile(
         descriptions: vine
             .array(
                 vine.object({
-                    value: vine.string().trim().minLength(3).maxLength(255),
+                    value: vine.string().trim().minLength(3).maxLength(2500),
                     type: vine.enum(Object.values(DescriptionTypes)),
                     language: vine
                         .string()
@@ -295,6 +295,7 @@ let messagesProvider = new SimpleMessagesProvider({
     'rights.in': 'you must agree to continue',
 
     'titles.0.value.minLength': 'Main Title  must be at least {{ min }} characters long',
+    'titles.0.value.maxLength': 'Main Title  must be less than {{ max }} characters long',
     'titles.0.value.required': 'Main Title is required',
     'titles.*.value.required': 'Additional title is required, if defined',
     'titles.*.type.required': 'Additional title type is required',