switch from tinacms to sanity

package.json

@@ -3,35 +3,32 @@
   "type": "module",
   "version": "0.0.1",
   "scripts": {
-    "dev": "tinacms dev -c \"astro dev\"",
+    "dev": "astro dev",
     "build": "astro check && astro build",
-    "build:tina": "tinacms build && astro check && astro build",
-    "build:docker": "tinacms build && astro build",
     "preview": "astro preview",
-    "astro": "astro"
+    "astro": "astro",
+    "migrate": "node --env-file=.env scripts/migrate-to-sanity.mjs"
   },
   "dependencies": {
     "@astrojs/check": "^0.9.9",
-    "@astrojs/mdx": "^5.0.4",
+    "@astrojs/react": "^5.0.4",
+    "@portabletext/to-html": "^5.0.2",
+    "@sanity/astro": "^3.4.0",
+    "@sanity/client": "^7.22.0",
+    "@sanity/image-url": "^2.1.1",
+    "@sanity/vision": "^3.0.0",
     "@tailwindcss/vite": "^4.2.4",
-    "@tinacms/cli": "^2.2.5",
-    "@tinacms/datalayer": "^2.0.18",
-    "fs-extra": "^9.1.0",
     "astro": "^6.2.1",
-    "express": "^5.2.1",
-    "mongodb-level": "^0.0.4",
-    "next": "^15.5.15",
-    "next-auth": "^4.24.14",
     "react": "^19.2.5",
     "react-dom": "^19.2.5",
-    "slate": "^0.124.1",
-    "slate-dom": "^0.124.1",
-    "slate-hyperscript": "^0.100.0",
-    "slate-react": "^0.124.0",
+    "react-is": "^19.0.0",
+    "sanity": "^5.24.0",
+    "styled-components": "^6.1.19",
     "tailwindcss": "^4.2.4",
-    "tinacms": "^3.7.5",
-    "tinacms-authjs": "^21.0.5",
-    "tinacms-gitprovider-github": "^4.1.5",
-    "typescript": "^5.6.3"
+    "typescript": "^5.6.3",
+    "vite": "^7"
+  },
+  "devDependencies": {
+    "@portabletext/markdown": "^1.2.0"
   }
 }