(DOCSP-27391): Add a link to App Services Sync Errors from SDKs

[dacharyc]

Pull Request Info

This PR is a quick bandaid to expose more information about Sync errors in the SDK docs in response to this issue: #2481

We should follow up with a larger project to expand our Sync error handling documentation across SDKs, and ensure consistency with API documentation & documented error codes in Core.

Jira

• https://jira.mongodb.org/browse/DOCSP-27391

Staged Changes

• Handle Sync Errors - Flutter SDK
• Sync Changes Between Devices - Java SDK
• Handle App Errors - Kotlin SDK
• Handle Sync Errors - .NET SDK
• Sync Changes Between Devices - Node.js SDK
• Handle Sync Errors - React Native SDK
• Handle Sync Errors - Swift SDK

Reminder Checklist

If your PR modifies the docs, you might need to also update some corresponding
pages. Check if completed or N/A.

• Create Jira ticket for corresponding docs-app-services update(s), if any
• Checked/updated Admin API
• Checked/updated CLI reference

Review Guidelines

REVIEWING.md

[github-actions]

Readability for Commit Hash: 02b4a5d

You can see any previous Readability scores (if they exist) by looking
at the comment's history.

Flesch Reading Ease scores for changed documents:

• source/sdk/swift/sync/handle-sync-errors: 50.33
• source/sdk/react-native/sync-data/handle-sync-errors: 50.84
• source/sdk/dotnet/sync/handle-sync-errors: 53.27
• source/sdk/node/examples/sync-changes-between-devices: 42.27
• source/sdk/flutter/sync/handle-sync-errors: 47.38
• source/sdk/java/examples/sync-changes-between-devices: 32.39
• source/sdk/kotlin/errors/app: 48.91

The following table can be helpful in assessing the readability score of a document.

Score	Difficulty
90-100	Very Easy
80-89	Easy
70-79	Fairly Easy
60-69	Medium
50-59	Fairly Hard
30-49	Hard
0-29	Very Hard