Make SuiviCPT an installable PWA

Adds what iOS/Android need to treat the site as an installable app
from Safari's "Add to Home Screen": a manifest.json, apple-touch-icon
set generated from the existing logo mark (scripts/generate-icons.mjs,
sharp as a dev dependency), and the apple-mobile-web-app-* meta tags
iOS Safari requires since it ignores manifest.json entirely.

The service worker is deliberately minimal — this app shows live
financial data, so navigations always hit the network first. It only
caches enough to serve offline.html when there's no connection, not a
full offline-first app shell.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

resources/views/layouts/app.blade.php

@@ -8,6 +8,7 @@
         <title>{{ config('app.name', 'Laravel') }}</title>
 
         @include('partials.theme-script')
+        @include('partials.pwa-meta')
 
         <!-- Fonts -->
         <link rel="preconnect" href="https://fonts.bunny.net">

resources/views/layouts/guest.blade.php

@@ -8,6 +8,7 @@
         <title>{{ config('app.name', 'Laravel') }}</title>
 
         @include('partials.theme-script')
+        @include('partials.pwa-meta')
 
         <!-- Fonts -->
         <link rel="preconnect" href="https://fonts.bunny.net">