Implement EnsureUserHasWorkspace Trait and Integrate into Controllers… (#741)

* Implement EnsureUserHasWorkspace Trait and Integrate into Controllers and Jobs

- Introduced the EnsureUserHasWorkspace trait to ensure users have at least one workspace when they are detached from a workspace.
- Integrated the trait into WorkspaceUserController to enforce workspace checks during user detachment.
- Updated RemoveWorkspaceGuests job to utilize the new trait for ensuring users have a workspace after detachment.
- Modified UserWorkspace model to call the ensureUserHasWorkspace method upon deletion, maintaining workspace integrity.

These changes enhance user management by ensuring that users always have a workspace, improving overall application stability.

* Add test

---------

Co-authored-by: Julien Nahum <julien@nahum.net>

api/app/Models/UserWorkspace.php

@@ -2,12 +2,15 @@
 
 namespace App\Models;
 
+use App\Traits\EnsureUserHasWorkspace;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 
 class UserWorkspace extends Model
 {
     use HasFactory;
+    use EnsureUserHasWorkspace;
+
     protected $table = 'user_workspace';
 
     protected $fillable = [
@@ -25,4 +28,13 @@ class UserWorkspace extends Model
     {
         return $this->belongsTo(Workspace::class);
     }
+
+    protected static function boot()
+    {
+        parent::boot();
+
+        static::deleted(function (UserWorkspace $userWorkspace) {
+            $userWorkspace->ensureUserHasWorkspace($userWorkspace->user);
+        });
+    }
 }