[Refactor] Remove Main.storyboard, and create TabBarController rogrammatically

[JackySONE]

• Create TabBarPage to replace Tab, this implementation you can change icons, names, orders, etc very easily. Everything is in one place wrapped with enums

14 remove storyboard

[denkeni]

Thanks! There's still an issue:

• To compile successfully, UIViewControllerExtension.swift needs to be removed.

And a few suggestions:

• Since Main.storyboard and Storyboards.swift were removed from project, the whole folder and files inside should be removed as well. (Remember to select "Move to Trash" rather than "Remove Reference" while removing source files with Xcode)
• Related extension functions can be removed, too.