Build CSS with Tailwind 4.3.3 standalone and daisyUI 5.7.47

tools/tailwind.sh downloads the pinned Tailwind binary and daisyUI's .mjs
plugins into the gitignored .tools/tailwind/, checking each against a pinned
sha256, so neither developers nor CI need Node. MSBuild compiles
Styles/app.css into wwwroot/css/app.css (also gitignored) on every build,
skipping the step when no source changed. The output is added to Content before
ResolveProjectStaticWebAssets, so a clean-clone publish still gets its .gz/.br
copies and a service-worker-assets.js entry.

index.html now loads css/app.css, plus ionicons as its own stylesheet. The old
bundle stays in the tree until the markup is migrated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

wwwroot/index.html

@@ -6,7 +6,8 @@
 	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
 	<title>Index</title>
 	<base href="/" />
-	<link href="css/style.min.css" rel="stylesheet" />
+	<link href="vendor/ionicons.min.css" rel="stylesheet" />
+	<link href="css/app.css" rel="stylesheet" />
 	<link href="manifest.json" rel="manifest" />
 	<link rel="apple-touch-icon" sizes="512x512" href="imgs/icon-512.png" />
 	<link rel="apple-touch-icon" sizes="192x192" href="imgs/icon-192.png" />