feat(files): replace netrw with nvim-tree for improved file exploration

lua/core/options.lua

@@ -60,10 +60,8 @@ for k, v in pairs(options) do
     vim.opt[k] = v
 end
 
--- netrw file explorer settings
-vim.g.netrw_winsize = 20
-vim.g.netrw_banner = 0
-vim.g.netrw_liststyle = 1
+vim.g.loaded_netrw = 1
+vim.g.loaded_netrwPlugin = 1
 
 vim.opt.path:append({ '**' })
 vim.opt.shortmess:append({ W = true, I = true, c = true }) -- disable greeting