Create app.txt

[Syrine2299]

Subsystem Client/Server, related modules

Motivation Describe what problem this PR solves and why it is important. Refer to a bug/ticket #.

Solution Describe your solution.

[Syrine2299]

gg

[Amejonah1200]

What does this even do?

[Sterta]

Just a bot, simply report him for abuse (he is doing similar pull requests also to other popular repos)