Add neovim config

nvim/lua/config/options.lua

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+-- Explorer tree style
+vim.cmd("let g:netrw_liststyle = 3")
+
+-- Theme
+
+local opt = vim.opt
+
+-- Show string numbers relative to cursor position
+opt.relativenumber = true
+-- Show string numper of cursor position
+opt.number = true
+
+-- tabs & idents
+opt.tabstop = 2 -- 2 spaces for tab
+opt.shiftwidth = 2 -- 2 spaces for ident
+opt.expandtab = true -- expand tab to spaces
+opt.autoindent = true -- save indent when start new line
+
+-- Wrap long strings to fit screen size
+opt.wrap = true
+
+-- search
+opt.ignorecase = true -- ignore case
+opt.smartcase = true -- case-sensitive when mixed case in search
+
+-- highlite line with cursor
+-- opt.cursorline = true
+
+-- turn on terminal colors
+opt.termguicolors = true
+opt.background = "dark"
+opt.signcolumn = "yes"
+
+-- backspace
+opt.backspace = "indent,eol,start" -- allow backspace on indent, end of line or insert mode start position
+
+-- clipboard
+opt.clipboard:append("unnamedplus") -- use system clipboard as default register
+
+-- split windows
+opt.splitright = true -- split vertical window to the right
+opt.splitbelow = true -- split horizontal window to the bottom
+
+-- turn off swapfile
+opt.swapfile = false
+
+-- opt.messagesopt = "wait:10000,history:50"