Cascading keybinding "themes"

[eugenesvk]

Helix has this nice feature of cascading themes where you can refer to one of many supplied themes and only override the few colors that you don't like (but no one stops you from overriding/rewriting all the colors!)

Keybindings are arguably even more important that colors, so I'd suggest Helix to have a similar architecture:

• Include a bunch of named "keybinding themes"
• Allow users to refer to a keybinding theme via some inherit_keybinds = "vim_compat_mode" (or you could have a second version field ["vim_compat_mode","2.5"]

This has a few strong benefits:

• Partially addresses the fundamentally unsolvable issue of different people requesting different keybinding defaults, so e.g., you could have a strict "vim-compatibility theme" that wouldn't require much learning from people coming from vim and is also easier that trying to find & copy&paste a config
• Allows to continuously improve the default keybinds and not get stuck forever with the original h◀ mistakes since Helix can always carry the diffs with the default keybinding from old version 22.08, and any user upgrading and hating the changes introduced in version 23.03 can simply change a couple of numbers in his config to retain the old ones
• Similarly, allows users to get updates from a given theme that you haven't overriden/pinned to a version once new/better commands become available