deps: upgrade Astro from v5 to v6 (includes Vite 7) (#145)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: ubmit

package.json

@@ -14,19 +14,20 @@
     "resume:watch": "typst watch ./resume/resume.typ ./public/resume.pdf"
   },
   "dependencies": {
-    "@astrojs/check": "^0.9.6",
-    "@astrojs/mdx": "^4.3.13",
-    "@astrojs/rss": "^4.0.15",
-    "@astrojs/sitemap": "^3.7.0",
+    "@astrojs/check": "^0.9.8",
+    "@astrojs/mdx": "^5.0.2",
+    "@astrojs/rss": "^4.0.17",
+    "@astrojs/sitemap": "^3.7.1",
     "@fontsource/work-sans": "^5.0.18",
     "@radix-ui/colors": "^3.0.0",
-    "astro": "^5.16.14",
+    "astro": "^6.0.6",
     "chart.js": "^4.5.1",
     "clsx": "^2.1.0",
     "tailwind-merge": "^3.4.0",
     "typescript": "^5.9.3"
   },
   "devDependencies": {
+    "@astrojs/upgrade": "^0.7.1",
     "@myriaddreamin/typst-ts-node-compiler": "0.7.0-rc2",
     "@tailwindcss/typography": "^0.5.19",
     "@tailwindcss/vite": "^4.1.18",
@@ -36,3 +37,4 @@
     "tailwindcss": "^4.1.18"
   }
 }
+