Feat: Upgrade to Astro v5 Tailwind v4

Squashed commit of the following:

commit 24037ae
Author: Qi Xiang <qixyqix@outlook.com>
Date:   Fri Dec 5 02:40:25 2025 +0800

    Fix: li margin

commit d9e483a
Author: Qi Xiang <qixyqix@outlook.com>
Date:   Fri Dec 5 02:39:44 2025 +0800

    Fix: list outside

commit 2f736a6
Author: Qi Xiang <qixyqix@outlook.com>
Date:   Fri Dec 5 02:36:50 2025 +0800

    Fix: tailwind v4 adjustments

commit 6b01d25
Author: Qi Xiang <qixyqix@outlook.com>
Date:   Fri Dec 5 01:42:02 2025 +0800

    Feat: Upgrade to tailwind 4

commit ad383bf
Author: Qi Xiang <qixyqix@outlook.com>
Date:   Fri Dec 5 01:16:01 2025 +0800

    Feat: Upgrade to astro 5

Author: QixyQix

.astro/types.d.ts

@@ -1,2 +1,2 @@
 /// <reference types="astro/client" />
-/// <reference path="astro/content.d.ts" />
+/// <reference path="content.d.ts" />

astro.config.mjs

@@ -2,10 +2,14 @@ import { defineConfig } from 'astro/config';
 import mdx from '@astrojs/mdx';
 import sitemap from '@astrojs/sitemap';
 import embeds from 'astro-embed/integration';
-import tailwind from "@astrojs/tailwind";
+
+import tailwindcss from '@tailwindcss/vite'
 
 // https://astro.build/config
 export default defineConfig({
   site: 'https://wolvhaven.net',
-  integrations: [embeds(), mdx(), sitemap(), tailwind()]
+  integrations: [embeds(), mdx(), sitemap()],
+  vite: {
+    plugins: [tailwindcss()],
+  },
 });