hotfix: improve mimetype creation and dashboard data loading

- Added a NotificationBar component to display flash messages on the Mimetype creation page.
- Modified FormCheckRadioGroup to handle both numeric and string keys for input values.
- Removed unused code and API calls from Dashboard.vue and moved API calls to the component level where they are used.
- Added authentication middleware to the 'clients' and 'authors' API routes in `start/routes/api.ts`.
- Updated the file download route in `start/routes/api.ts` to include "file" in the path.
- Corrected the validation message key for file extension minLength in MimetypeController.ts.
- Updated favicon path in `resources/views/app.edge`.
- Added argon2 dependency in `package.json`.

app/Controllers/Http/Admin/MimetypeController.ts

@@ -64,7 +64,7 @@ export default class MimetypeController {
         'maxLength': '{{ field }} must be less then {{ max }} characters long',
         'isUnique': '{{ field }} must be unique, and this value is already taken',
         'required': '{{ field }} is required',
-        'file_extension.minLength': 'at least {{ min }} mimetypes must be defined',
+        'file_extension.array.minLength': 'at least {{ min }} mimetypes must be defined',
         'file_extension.*.string': 'Each file extension must be a valid string', // Adjusted to match the type
     };