[KBM] Use Caps Lock for toggle upper and lower cases in selected text

[sauloco]

Summary of the new feature/enhancement

Windows doesn't have a functionality to turn uppercase to lowercase and viceversa, also the Caps Lock key is in a great position and underused.

Proposed technical implementation details (optional)

When the user press Caps Lock the currently selected text toggle to uppercase or lowercase dependant on the Caps Lock state.

I made some stupid proof of concept with Python and keyboard listener a while ago: https://github.com/sauloco/easyToogleCase
It worked but has multiple limitations.

[Korb]

Windows doesn't have a functionality to turn uppercase to lowercase and viceversa, also the Caps Lock key is in a great position and underused.

@sauloco, can you explain how your proposal differs from #907 ("Transform (lowercase, Titlecase, UPPERCASE) Feature")?

[sauloco]

My idea is different because it propose to repurpose the Caps Lock functionality to perform the transformations, it's a commonly remapped key anyways but at least it will be remapped closer to its default function.
Being said that, this could be a comment in #907 instead of a new idea, I didn't see it when I created this.