docs: list native Android and Apple options in MAUI platform/guide

### Summary

List both the _Android Native Options_ and the _Apple Native Options_ in the docs for the Sentry MAUI SDK, for easier discoverability.

### Remarks

- `.NET for Android` has the page **Android Native Options**: https://docs.sentry.io/platforms/dotnet/guides/android/configuration/native-options/
- `.NET for iOS, macOS, or Mac Catalyst` has the page **Apple Native Options**: https://docs.sentry.io/platforms/dotnet/guides/apple/configuration/native-options/
- `MAUI` has neither

For discoverability, we could add both pages to the MAUI platform / guide.

Locate the Sentry MAUI platform guide in the documentation and compare its navigation with the linked .NET for Android and .NET for iOS, macOS, or Mac Catalyst native-options pages. Add discoverable links to both Android Native Options and Apple Native Options, then verify that both pages appear in the MAUI guide.

Written by the indexing model from the issue text.