feat: add "Lid toevoegen als deelnemer" shortcut for org members

Adds two new API endpoints to quickly add organisation members as event
persons with user_id pre-linked and status approved:
- GET /organisations/{org}/members/available-for-event/{event}
- POST /organisations/{org}/events/{event}/persons/from-member

Includes frontend dialog with member search, crowd type selection, and
click-to-add behavior in the Personen tab.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/app/Http/Requests/Api/V1/StorePersonFromMemberRequest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Requests\Api\V1;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+final class StorePersonFromMemberRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /** @return array<string, mixed> */
+    public function rules(): array
+    {
+        $orgId = $this->route('event')->organisation_id;
+
+        return [
+            'user_id' => ['required', 'ulid', 'exists:users,id'],
+            'crowd_type_id' => ['required', 'ulid', Rule::exists('crowd_types', 'id')->where('organisation_id', $orgId)],
+        ];
+    }
+}