Simplify order creation and editing - remove autosave

- Removed autosave.js (665 lines) and draft-creator.js (441 lines)
- Removed draft_service.py (~500 lines) and DraftOrderService
- Removed AJAX endpoints: autosave and create-draft
- Updated order_create() to add is_create_page flag
- Updated order_update() to finalize drafts without DraftOrderService
- Added get_new_status() method to OrderStatusService
- Updated order_form.html:
  - Removed old JS includes
  - Added beforeunload warning for unsaved data
  - Updated buttons: separate buttons for create/draft/finalize
- Total code reduction: ~1600 lines (92% removed)

New workflow:
- /orders/create/ - user fills form, chooses button
- /orders/<id>/edit/ - simple editing without autosave
- beforeunload warning when leaving page (except on submit)

myproject/orders/services/__init__.py

@@ -1,7 +1,5 @@
 """
-!5@28A=K9 A;>9 4;O ?@8;>65=8O orders.
+Сервисный слой для приложения orders.
 """
 
-from .draft_service import DraftOrderService
-
-__all__ = ['DraftOrderService']
+__all__ = []