Use lua version of `nmap`, `nnoremap`, `vnoremap`, ...

[Dhruv Manilawala]

Define the keymap functions (nnoremap, nmap, vnoremap, ...) and use that throughout the config. This will also allow me to pass in pure lua functions similar to that of command and autocmd.

Reference:

• https://github.com/tjdevries/astronauta.nvim
• https://github.com/akinsho/dotfiles/blob/main/.config/nvim/lua/as/globals.lua

[Dhruv Manilawala]

Closed by 5bea927