Support for a-z keys

[brccabral]

Hi,
I was able to implement a-z usage.
Users can configure like this

"default"[a] = "lavender Pen";
"default"[B] = "blue Rect";

When users press Hotkey all a-z keys are grabbed and they won't be able to type, but pressing the Hotkey again will release them so users can type back.
Case is insensitive, lower and upper cases do the same action, the last one configured will be used.

This is a continuation of #199

Let me know if you have any questions.
Bruno

[bk138]

@brccabral if I'm not mistaken, this will only work under X11 directly, not XWayland?

[brccabral]

Hi @bk138 ,
I tested on Ubuntu 23.10 both X11 and Wayland sessions, it is working on both.