fix(deps): update astro to v7

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
     "@iconify-json/mdi": "1.2.3",
     "@octokit/openapi-types": "27.0.0",
     "@tailwindcss/vite": "4.3.0",
-    "astro": "6.4.8",
+    "astro": "7.0.0",
     "astro-icon": "1.1.5",
     "date-fns": "4.4.0",
     "marked": "18.0.5",