Add comment keyboard shortcut

[Zachatoo]

Add a keyboard shortcut for commenting in a CSS file.

Default to Meta + /, but allow it to be customizable if possible.

[Zachatoo]

Did some discovery. Turns out the toggle comment keybind already works if Obsidian's default keybind for toggle comments is turned off or changed to another keybind.

Ideally, the CSS Editor plugin should follow the same keybind as setup in Obsidian settings, and should override Obsidian's command when run in a CSS Editor View.

Or, at the very least, if Obsidian has any keybinds for Meta + /, to ignore it when in a CSS Editor View.

[Zachatoo]

Found a solution for ignoring Obsidian keybinds while in a CSS Editor View, this is sufficient for my needs at the moment. Released in 0.5.0.