Neovim, refactor to use modules, lua, and LSP

Refactors the neovim config to use nix modules, and changes the plugins
to favor the builtin neovim LSP over COC. Changes all code to use lua
code instead of vimscript.

hmModules/apps/neovim/options.lua

@@ -0,0 +1,57 @@
+-- Globals
+vim.g.mapleader = ' '
+vim.g.maplocalleader = ' '
+vim.opt.list = true
+vim.bo.filetype = true
+vim.opt.updatetime = 300
+
+-- Indentations
+vim.opt.tabstop = 2
+vim.opt.softtabstop = 0
+vim.opt.shiftwidth = 2
+vim.opt.smarttab = true
+vim.opt.expandtab = true
+
+-- Style
+vim.opt.colorcolumn = "80"
+vim.opt.showmatch = true
+vim.opt.number = true
+vim.opt.relativenumber = true
+
+-- Easy Split Navigation
+-- nnoremap <C-J> <C-W><C-J>
+-- nnoremap <C-K> <C-W><C-K>
+-- nnoremap <C-L> <C-W><C-L>
+-- nnoremap <C-H> <C-W><C-H>
+
+-- Searching
+vim.opt.smartcase = true
+
+-- Backups
+vim.opt.swapfile = false
+vim.opt.backup = false
+vim.opt.undofile = true
+vim.opt.undodir = '/home/pan/.config/nvim/undodir'
+
+-- Easy copy and pasting to external programs
+-- map <C-y> "+yy
+-- map <C-p> "+P
+
+-- autocmd BufRead,BufNewFile *.md call WritingMode()
+-- autocmd BufRead,BufNewFile *.tex call WritingMode()
+-- autocmd BufRead,BufNewFile *.svx call WritingMode()
+
+-- autocmd BufRead,BufNewFile *.py call PythonMode()
+
+-- function! WritingMode()
+  -- setlocal textwidth=80
+  -- setlocal wrap linebreak nolist
+  -- setlocal whichwrap+=<,>,h,l
+  -- nnoremap j gj
+  -- nnoremap k gk
+  -- setlocal spell spelllang=en_us
+-- endfunction
+-- function! PythonMode()
+  -- setlocal foldmethod=indent
+  -- setlocal foldlevel=99
+-- endfunction