[Flock][Feature] - Desktop stylus support

[CodeDoctorDE]

Flutter Issue Ticket Link:
Windows: flutter/flutter#65248 and flutter/flutter#102836
Linux: flutter/flutter#63209

Why didn't Flutter implement this?
I don't know, it's the most important aspect of a cross platform solution to support all input devices. For me it's not really a feature, it should be considered as a bug.

Why does this belong in Flock?
Flock is mainly trying to improve desktop support and this is one of the aspects that needs to be improved.

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Describe the solution you'd like
I tried to add support for windows but failed (flutter/engine#46163). Sadly I couldn't get any help from their discord.
The current input system shows touch as input type.

Additional context
In the long run we need to migrate from WM_TOUCH events in the windows platform to WM_POINTER to allow getting pressure, rotation, ... (which was added in windows 8).