feat: add notes management feature with CRUD operations

- Created Note model and controller for handling notes.
- Added routes for notes CRUD operations.
- Implemented notes index view with search and pinning functionality.
- Created migration for notes table with necessary fields.
- Developed event creation form with client and contract options.

app/Models/MediaFile.php

@@ -41,6 +41,11 @@ class MediaFile extends Model
         return str_starts_with($this->mime_type, 'image/');
     }
 
+    public function getIsVideoAttribute(): bool
+    {
+        return str_starts_with($this->mime_type, 'video/');
+    }
+
     public function getIconAttribute(): string
     {
         if ($this->is_image) return '🖼️';