feat: implement server self-upgrade functionality

- Added update service to fetch the latest server release from GitHub.
- Implemented server upgrade scheduling and execution logic.
- Created platform-specific restart mechanisms for Unix and Windows.
- Introduced API endpoints for fetching the latest release and triggering upgrades.
- Developed UI components for version upgrade modal, including loading and error states.
- Updated documentation to reflect new upgrade features and instructions.
- Refactored settings types to streamline interface definitions.

atsf_server/web/features/update/api/update.ts

@@ -0,0 +1,13 @@
+import { apiRequest } from '@/lib/api/client';
+
+import type { LatestReleaseInfo } from '@/features/update/types';
+
+export function getLatestRelease() {
+  return apiRequest<LatestReleaseInfo>('/update/latest-release');
+}
+
+export function upgradeServer() {
+  return apiRequest<LatestReleaseInfo>('/update/upgrade', {
+    method: 'POST',
+  });
+}