feat(schedules): add 'select all N' across pages

- Add GetAllScheduleIdsAction + GetFilteredScheduleIdsTask
- Add GET /dashboard/schedules/all-ids route returning filtered IDs
- Add selectAllFiltered method to Index.vue
- Button 'Выбрать все N' appears when total > per-page count

app/Containers/Dashboard/Actions/Schedules/GetAllScheduleIdsAction.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Containers\Dashboard\Actions\Schedules;
+
+use App\Containers\Dashboard\Tasks\Schedules\GetFilteredScheduleIdsTask;
+
+class GetAllScheduleIdsAction
+{
+    public function __construct(
+        private readonly GetFilteredScheduleIdsTask $task,
+    ) {}
+
+    public function run(array $filters = []): array
+    {
+        return $this->task->run($filters);
+    }
+}