Add smartcase option

lua/core/default_config.lua

@@ -12,6 +12,7 @@ M.options = {
    ruler = false,
    hidden = true,
    ignorecase = true,
+   smartcase = true,
    mapleader = " ",
    mouse = "a",
    number = true,

lua/core/options.lua

@@ -21,6 +21,7 @@ opt.fillchars = { eob = " " }
 
 opt.hidden = options.hidden
 opt.ignorecase = options.ignorecase
+opt.smartcase = options.smartcase
 opt.mouse = options.mouse
 
 -- Numbers