chore: update dependencies to use Tailwind CSS with Vite, remove old Tailwind integration, and bump version to 0.2.7

Author: cevheri

astro.config.mjs

@@ -1,12 +1,15 @@
 // @ts-check
 import { defineConfig } from 'astro/config';
-import tailwind from '@astrojs/tailwind';
+import tailwindcss from '@tailwindcss/vite';
 import sitemap from '@astrojs/sitemap';
 
 // https://astro.build/config
 export default defineConfig({
   site: 'https://libredb.org',
-  integrations: [tailwind(), sitemap()],
+  integrations: [sitemap()],
+  vite: {
+    plugins: [tailwindcss()],
+  },
   build: {
     assets: 'assets'
   }