Add support for neovim init.lua configs

Is your feature request related to a problem? Please describe.
I'm always frustrated when I have to make changes to my .vimrc file (I set "vim.vimrc.enable": true) to reflect changes I've done in my init.lua file (when configuring nvim). P.s. I'm aware that there is a "vim.neovimUseConfigFile" option, but when I tried setting "vim.neovimConfigPath" to my init.lua, it didn't work (simply nothing happened), so I'm assuming it only works for init.vim, which is very unfortunate

Describe the solution you'd like
Add support for init.lua, same as there currently is support for .vimrc (and init.vim, which I haven't tried, but looks like it's there)

Describe alternatives you've considered
Make neovim use the same configuration normal nvim would (init.lua) when "vim.enableNeovim" is set to true. This would actually be ideal

Start by tracing the vim.vimrc.enable, vim.neovimUseConfigFile, and vim.neovimConfigPath options, then compare how init.vim is handled with the requested init.lua path. Done means Neovim can use init.lua without duplicating settings in .vimrc, with the existing configuration behavior preserved.