add nvim config

.config/nvim/lua/crux/core/init.lua

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+require("crux.core.options")
+require("crux.core.options")
+require("crux.core.keymaps")

.config/nvim/lua/crux/core/keymaps.lua

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+-- set leader key to space
+vim.g.mapleader = " "
+
+local keymap = vim.keymap -- for conciseness
+
+---------------------
+-- General Keymaps -------------------
+
+-- use jk to exit insert mode
+keymap.set("i", "jk", "<ESC>", { desc = "Exit insert mode with jk" })
+
+-- clear search highlights
+keymap.set("n", "<leader>nh", ":nohl<CR>", { desc = "Clear search highlights" })
+
+-- delete single character without copying into register
+-- keymap.set("n", "x", '"_x')
+
+-- increment/decrement numbers
+keymap.set("n", "<leader>+", "<C-a>", { desc = "Increment number" }) -- increment
+keymap.set("n", "<leader>-", "<C-x>", { desc = "Decrement number" }) -- decrement
+
+-- window management
+keymap.set("n", "<leader>sv", "<C-w>v", { desc = "Split window vertically" }) -- split window vertically
+keymap.set("n", "<leader>sh", "<C-w>s", { desc = "Split window horizontally" }) -- split window horizontally
+keymap.set("n", "<leader>se", "<C-w>=", { desc = "Make splits equal size" }) -- make split windows equal width & height
+keymap.set("n", "<leader>sx", "<cmd>close<CR>", { desc = "Close current split" }) -- close current split window
+
+keymap.set("n", "<leader>to", "<cmd>tabnew<CR>", { desc = "Open new tab" }) -- open new tab
+keymap.set("n", "<leader>tx", "<cmd>tabclose<CR>", { desc = "Close current tab" }) -- close current tab
+keymap.set("n", "<leader>tn", "<cmd>tabn<CR>", { desc = "Go to next tab" }) --  go to next tab
+keymap.set("n", "<leader>tp", "<cmd>tabp<CR>", { desc = "Go to previous tab" }) --  go to previous tab
+keymap.set("n", "<leader>tf", "<cmd>tabnew %<CR>", { desc = "Open current buffer in new tab" }) --  move current buffer to new tab

.config/nvim/lua/crux/core/options.lua

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+vim.cmd("let g:netrw_liststyle = 3")
+
+local opt = vim.opt -- for conciseness
+
+-- line numbers
+opt.relativenumber = false -- show relative line numbers
+opt.number = true -- shows absolute line number on cursor line (when relative number is on)
+
+-- tabs & indentation
+opt.tabstop = 2 -- 2 spaces for tabs (prettier default)
+opt.shiftwidth = 2 -- 2 spaces for indent width
+opt.expandtab = true -- expand tab to spaces
+opt.autoindent = true -- copy indent from current line when starting new one
+
+-- line wrapping
+opt.wrap = false -- disable line wrapping
+
+-- search settings
+opt.ignorecase = true -- ignore case when searching
+opt.smartcase = true -- if you include mixed case in your search, assumes you want case-sensitive
+
+-- cursor line
+opt.cursorline = true -- highlight the current cursor line
+
+-- appearance
+
+-- turn on termguicolors for nightfly colorscheme to work
+-- (have to use iterm2 or any other true color terminal)
+opt.termguicolors = true
+opt.background = "dark" -- colorschemes that can be light or dark will be made dark
+opt.signcolumn = "yes" -- show sign column so that text doesn't shift
+
+-- 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