move apis into rom/modules/main for shell compatibility

sys/modules/opus/ui/components/MenuItem.lua

@@ -0,0 +1,14 @@
+local class = require('opus.class')
+local UI    = require('opus.ui')
+
+local colors = _G.colors
+
+--[[-- MenuItem --]]--
+UI.MenuItem = class(UI.Button)
+UI.MenuItem.defaults = {
+	UIElement = 'MenuItem',
+	textColor = colors.black,
+	backgroundColor = colors.lightGray,
+	textFocusColor = colors.white,
+	backgroundFocusColor = colors.lightGray,
+}