chore: update all dependencies to latest (#37)

- Astro 5.1 -> 5.17
- Starlight 0.31 -> 0.37 (social config migrated to array format)
- Tailwind CSS 3 -> 4 (migrated to Vite plugin + CSS-based config)
- sharp 0.32 -> 0.34
- ESLint 8 -> 9 (migrated to flat config)
- Prettier, prettier-plugin-astro, prettier-plugin-tailwindcss updated
- Removed dotenv (using Astro import.meta.env)
- Removed tailwind.config.mjs (config now in CSS via @theme)
- Updated Badge import to new Starlight components path
- Node.js 18 -> 22
- Switched from npm to bun

src/content/docs/ingredients/file.mdx

@@ -3,7 +3,7 @@ title: grlx.ingredients.file
 description: file
 ---
 
-import Badge from '@astrojs/starlight/components/Badge.astro';
+import { Badge } from '@astrojs/starlight/components';
 
 The file ingredient handles all file operations on various [file providers](/ingredients/file-providers) (such as local files, HTTP, etc.)
 ## **file.absent**