feat: add message attachments (wip)

package.json

@@ -15,6 +15,8 @@
         "@ai-sdk/cohere": "^3.0.21",
         "@ai-sdk/google": "^3.0.29",
         "@ai-sdk/openai-compatible": "^2.0.30",
+        "@aws-sdk/client-s3": "^3.1000.0",
+        "@aws-sdk/s3-request-presigner": "^3.1000.0",
         "@daveyplate/better-auth-triplit": "^0.2.2",
         "@iconify-json/mynaui": "^1.2.17",
         "@nuxt/fonts": "0.14.0",