feat: keyboard shortcut to create a new thread

[davidawad]

Problem
as far as I can tell, I can't set a keyboard shortcut to create a new thread. I could make a PR for this but it might be easier for someone who knows the repository better as it would be quicker :)

Success Criteria

1. there should be some keyboard shortcut (in my opinion, cmd+n / ctrl +n) to create a new thread and automatically focus the cursor to the input box on the bottom.

2. I should be able to customize the keyboard shortcut to whatever input sequence, that would be huge for user satisfaction and it's low hanging fruit.

[davidawad]

For the record I'm sure this is easy enough I'd be happy to do it if anyone can give me some basic guidance to implement it.

[tikikun]

+1

[Van-QA]

looking good as of Jan v0.4.11-386

[davidawad]

this works, thanks guys 👌