chore: Configure iOS universal linking (#10651)

- Moved `apple-app-site-association` to
`.well-known/apple-app-site-association`
https://docs.expo.dev/linking/ios-universal-links/#create-aasa-file
- Updated the paths pattern to accept conversation links only.

app/views/apple_app/site_association.html.erb

@@ -4,7 +4,7 @@
         "details": [
             {
                 "appID": "<%= ENV['IOS_APP_ID'] %>",
-                "paths": [ "NOT /super_admin/*", "*" ]
+                "paths": [ "/app/accounts/*/conversations/*"]
             }
         ]
     }