Expand keybind parsing options from string

[jni]

• app-model version: 0.2.7
• Python version: 3.11
• Operating System: macOS

Description

It would be useful to have a more lenient parser, as long as it's unambiguous, so that OS-specific keybindings can be written out more easily. Specifically, it would be good if SimpleKeyBinding.from_str/app_model.types._keys._keybindings._parse_modifiers could account for:

Control vs Ctrl (maybe even vs ^, though I'm less interested in that)
Cmd vs Command
Alt vs Option

What I Did

In [16]: str(KeyBinding.from_str('Command-Y'))
Out[16]: ''

In [17]: str(KeyBinding.from_str('Control-Y'))
Out[17]: ''

In [18]: str(KeyBinding.from_str('Option-Y'))
Out[18]: ''