adding neovim config, splitting it up

.config/nvim/lua/klowner/core.lua

@@ -0,0 +1,38 @@
+vim.g.netrw_liststyle = 3
+vim.g.mapleader = " "
+vim.g.maplocalleader = " "
+
+-- options
+local opt = vim.opt
+opt.relativenumber = true
+opt.number = true
+opt.autoread = true   -- automatically reload modified files
+opt.wildmenu = true   -- handle autocompletion menu
+
+-- utility functions for key mappings
+function ToggleLineNumbering()
+  vim.o.number = not vim.o.number
+  vim.o.relativenumber = vim.o.number
+end
+
+-- keymappings
+local keymap = vim.keymap
+
+keymap.set('n', '<leader>n', ':lua ToggleLineNumbering()<CR>', {desc="Toggle line numbering"})
+
+keymap.set('', '<C-n>', ':bnext<CR>', {desc="Jump to next buffer"})
+keymap.set('', '<C-p>', ':bprev<CR>', {desc="Jump to previous buffer"})
+
+keymap.set('', '<C-h>', '<C-W>h', {desc="Focus window left"})
+keymap.set('', '<C-j>', '<C-W>j', {desc="Focus window down"})
+keymap.set('', '<C-k>', '<C-W>k', {desc="Focus window up"})
+keymap.set('', '<C-l>', '<C-W>l', {desc="Focus window right"})
+
+keymap.set('n', '<leader>pu', ':Lazy update<CR>', {desc="Update plugins managed by Lazy"})
+keymap.set('n', '<leader>pi', ':Lazy install<CR>', {desc="Install missing plugins managed by Lazy"})
+keymap.set('n', '<leader>pc', ':Lazy clean<CR>', {desc="Clean plugins managed by Lazy"})
+
+keymap.set('n', '<leader>w', ':w!<CR>', {desc="Quicksave"})
+
+keymap.set('n', '<F7>', 'mzgg=G`z<CR>', {desc="Auto-format entire document"})
+keymap.set('v', '<C-o>', ':sort<CR>', {desc="Sort selected lines alphanumerically"})