Update mobile app release notes for v19.0.0

[MendixMobile]

Automated sync of the latest release notes for v19.0.0 from native-template.

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Note:
This pull request was automatically generated by an automation process managed by the Mobile team.
Please do not take any action on this pull request unless it has been reviewed and approved by a member of the Mobile team.

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[ConnorLand]

The RN bot correctly wrote the RNs, but this version requires those notes go into a new (as yet created) markdown doc. The bot didn't have the knowlege to do this, so it accidentally put it in an older doc.

@vadymv-mendix made a new PR for these RNs which I've handled, and he's also planned a fix for the bot so this doesn't happen again. SME excellence from @vadymv-mendix 🥇