Simplify + add whichkey mappings

lua/core/init.lua

@@ -1 +1,18 @@
-require("core.settings")
+local opt = vim.opt
+local g = vim.g
+
+g.mapleader = " "
+
+opt.backup = false
+opt.swapfile = false
+opt.termguicolors = true
+opt.number = true
+opt.mouse = "a"
+opt.cursorline = true
+opt.hidden = true
+
+-- Indentation
+opt.expandtab = true
+opt.smartindent = true
+opt.shiftwidth = 4
+opt.tabstop = 4