Consider switching away from DSL to a <Plug> model

[andrewferrier]

https://github.com/nvim-neorocks/nvim-best-practices?tab=readme-ov-file#keyboard-keymaps

[andrewferrier]

Also consider what to do with the fix for issue #99 which was reverted.

[andrewferrier]

Even :lua-plugin recommends <Plug> now.