feat: add ai detection for recipients and fields (#2271)

Use Gemini to handle detection of recipients and fields within
documents.

Opt in using organisation or team settings.

Replaces #2128 since the branch was cursed and would include
dependencies that weren't even in the lock file.



https://github.com/user-attachments/assets/e6cbb58f-62b9-4079-a9ae-7af5c4f2e4ec

packages/tsconfig/process-env.d.ts

@@ -86,5 +86,12 @@ declare namespace NodeJS {
     DATABASE_URL?: string;
     POSTGRES_PRISMA_URL?: string;
     POSTGRES_URL_NON_POOLING?: string;
+
+    /**
+     * Google Vertex AI environment variables
+     */
+    GOOGLE_VERTEX_PROJECT_ID?: string;
+    GOOGLE_VERTEX_LOCATION?: string;
+    GOOGLE_VERTEX_API_KEY?: string;
   }
 }