build(ui): add Tailwind v4 + daisyUI 5 pipeline

daisyUI is an npm plugin, so the standalone Tailwind CLI can't load it; this
adds a real build. Themes are configured as `light --default, dark
--prefersdark`, so dark follows the OS with no JavaScript, and an explicit
data-theme (set by the toggle) overrides it.

The built CSS is committed, so `uv run manage.py runserver` remains all a
Python dev needs; `npm run watch` is only for those touching styles.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -0,0 +1,14 @@
+{
+  "name": "clubmanager",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "build": "tailwindcss -i ./static/src/app.css -o ./static/css/app.css --minify",
+    "watch": "tailwindcss -i ./static/src/app.css -o ./static/css/app.css --watch"
+  },
+  "devDependencies": {
+    "@tailwindcss/cli": "^4.1.0",
+    "daisyui": "^5.0.0",
+    "tailwindcss": "^4.1.0"
+  }
+}