Fix lua vim awareness, enable prettier, fix gitsigns

- Make lua aware of vim runtime
- enable prettier for json, html, css, yaml, markdown
- gitsigns was not enabled

lua/plugins/style.lua

@@ -42,7 +42,10 @@ return {
 			}
 		end
 	},
-	{ 'lewis6991/gitsigns.nvim' },
+	{
+		'lewis6991/gitsigns.nvim',
+		config = true
+	},
 	{
 		'glepnir/dashboard-nvim',
 		event = 'VimEnter',