Use single UserInputHandler for all other _Handler classes

[ReagentX]

Currently we initialize a new one every time we want to get input.

[Tzrlk]

This might be related to why I get double-inputs when dealing with anything interactive. I can't enter "0" at a prompt, only "00".

This is on Windows 10 Terminal with Powershell 7.4.10 , logria 0.4.1 from cargo 1.87.0.
Same result on git bash in its own window (not Win Terminal).

[ReagentX]

That issue is caused by crossterm-rs/crossterm#752.

[Tzrlk]

Amazing that they report the only terminal not to have the bug is the old cmd shell. I didn't test that because it seemed absurd. I guess I'll give it a go.

Would you like me to raise this as a separate issue?

[ReagentX]

Yes please, seems easy enough to resolve.