Better assigment of keymaps

[vieitesss]

Motivation

Right now, I am hard-coding the possible modes of the keymappings

https://github.com/vieitesss/command.nvim/blob/f33b1470dafd9fe8785aea48419508bbcf522221/lua/command/ui/keymaps/prompt.lua#L15C1-L16C85

Solution

It would be better to make a function that:

• takes the configuration of the keymaps, like n = { '<Up>', prompt_act.history_up }.
• gets the key, that's the mode, and can be any valid character refering to a mode nixv.
• converts this to a valid set of options to pass as a parameter to vim.keymap.set.