Move warning message to status bar + allow mouse click to enter input mode

[ratierd]

I've been going full circle until I found this extension, going from vim emulation to neovim as a backend to finally this.

It's a really cool extension and I'm surprised there's not a lot a ressources on the internet about it.

I'd love to add some minor additions that make sense to me :

• Replace the vscode warning message for unmapped keysequences by leveraging the extension's status bar
• Allow the user to have mouse clicks enter input mode (I made this a configurable setting as I know people might disagree with me here, the option is also turned off by default)

As this is my first contribution to this project sorry if I failed to follow previous guidelines.

Please let me know if anything seems weird :smile: