Add butterfly 2.5.0-rc.0, update to astro 6

Author: CodeDoctorDE

package.json

@@ -10,20 +10,20 @@
     "astro": "astro"
   },
   "dependencies": {
-    "@astrojs/mdx": "^4.3.13",
-    "@astrojs/rss": "^4.0.15",
-    "@astrojs/sitemap": "^3.7.0",
+    "@astrojs/mdx": "5.0.0",
+    "@astrojs/rss": "4.0.17",
+    "@astrojs/sitemap": "3.7.1",
     "@linwooddev/style": "^0.4.2",
     "@phosphor-icons/web": "^2.1.2",
-    "astro": "^5.18.0",
+    "astro": "6.0.3",
     "remark-custom-header-id": "^1.0.0",
     "sharp": "^0.34.5",
     "typescript": "^5.9.3"
   },
   "packageManager": "pnpm@10.30.3",
   "devDependencies": {
     "@vite-pwa/astro": "^1.2.0",
-    "sass": "^1.97.3",
+    "sass": "^1.98.0",
     "vite-plugin-pwa": "^1.2.0",
     "workbox-window": "^7.4.0"
   }