feat(backups): support scheduled backups for application storage targets

Add polymorphic volume backup scheduling for persistent volumes and directories, expose schedule management via API, and reorganize backup configuration and execution views.

resources/views/livewire/project/database/backup-edit/danger.blade.php

@@ -0,0 +1,27 @@
+<div class="flex flex-col gap-6">
+    <div>
+        <h2>Danger Zone</h2>
+        <div class="text-neutral-500">Woah. I hope you know what you are doing.</div>
+    </div>
+
+    <div>
+        <h3>Delete Scheduled Backup</h3>
+        <div class="pb-4 text-neutral-500">
+            This permanently deletes the schedule. You can also delete its associated backup archives. There is no coming back.
+        </div>
+        @if ($backup->database_id !== 0)
+            <x-modal-confirmation title="Confirm Backup Schedule Deletion?" isErrorButton submitAction="delete"
+                :checkboxes="$checkboxes" :actions="[
+                    'The selected backup schedule will be deleted.',
+                    'Scheduled backups for this database will be stopped (if this is the only backup schedule for this database).',
+                ]"
+                confirmationText="{{ $backup->database->name }}"
+                confirmationLabel="Please confirm the execution of the actions by entering the Database Name of the scheduled backups below"
+                shortConfirmationLabel="Database Name">
+                <x-slot:trigger>
+                    <x-forms.button isError>Delete Backups and Schedule</x-forms.button>
+                </x-slot:trigger>
+            </x-modal-confirmation>
+        @endif
+    </div>
+</div>