Account for keyboard layout variant for keybinding helper

[blegat]

In omarchy menu keybindings, I see the wrong keys for expanding and shrinking windows. This is because kbcli compile-keymap is called without any --layout nor --variant flag so it defaults to US/qwerty even though my kb_layout is be.
So xkbcli compile-keymap gives AE11=minus, AE12=equal and xkbcli compile-keymap --layout be gives AE11=parenright, AE12=minus.

The change in the output of omarchy menu keybindings with this PR is as follows:

Before	After
SUPER + minus → Expand window left	SUPER + parenright → Expand window left
SUPER + equal → Shrink window left	SUPER + minus → Shrink window left
SUPER SHIFT + minus → Shrink window up	SUPER SHIFT + parenright → Shrink window up
SUPER SHIFT + equal → Expand window down	SUPER SHIFT + minus → Expand window down

Closes #4188
Closes #734

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