Add Windows 7 deploy bundle pipeline

Self-contained zip (dist/avtoambor-deploy.zip) for end users on Windows 7:
double-click install.bat to install Node 16, then start.bat to launch the
server. start.bat self-relaunches minimized so the console window stays out
of the way. Node is pinned to 16.x and several deps downgraded for Win7
compatibility; the unsupported View Transitions hook is dropped from the
root layout. make bundle wraps scripts/make-bundle.sh.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routes/+layout.svelte

@@ -1,16 +1,5 @@
 <script>
-  import { onNavigate } from '$app/navigation';
   import Header from '$lib/components/Header.svelte';
-
-  onNavigate((navigation) => {
-    if (!document.startViewTransition) return;
-    return new Promise((resolve) => {
-      document.startViewTransition(async () => {
-        resolve();
-        await navigation.complete;
-      });
-    });
-  });
 </script>
 
 <Header />