CommonClient: Move command marker to last_autofillable_command

[Jouramie]

What is this fixing or adding?

This changes the command marker ! from being hardcoded in get_input_text_from_response, to being explicit in last_autofillable_command. This allows / commands to use last_autofillable_command to be autofilled when user presses the "Didn't find something that closely matches 'something wrong', did you mean 'the correct name'? (66% sure)" message.

I need this to fix an issue with the Stardew client tracker. Currently, when pressing the autofill questions, the !hint command gets filled instead of the correct /explain command. Setting the last command to explain autofills !explain, with the wrong command marker.

Without this change, I would need to hook into the ConnectBarTextInput in intercept when the command is autofilled to change the marker. Every other client would also need to do that if they want the same behavior.

How was this tested?

I made typo with !hint, !hint_location, !getitem to make sure they still work. I also tested with the /explain commands from the Stardew client. See this commit agilbert1412@d2fdda4

If this makes graphical changes, please attach screenshots.

Current Stardew Client behavior

Screen.Recording.2025-04-20.at.12.34.12.PM.mov

With this change + setting `last_autofillable_command` correctly in the client

Screen.Recording.2025-04-20.at.12.28.06.PM.mov

[agilbert1412]

Changes do what they claim to do, but this is core, and I'm about 74 years too early to claim that I have any clue what the potential repercussions could be, so take my approval as like, 1/14th of an approval.