Tutorial/Introduction sequence [REQUEST]

[Amethyst-szs]

Is your feature request related to a problem? Please describe.
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Lots of people have been struggling to use LunaKit because of not understanding the controls or mechanics, and I made the false assumption that the whole thing is intuitive.

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On first startup, prompt the user to get a breakdown of how the whole system works. This will include a tutorial for all of the different controls, the docking system, and what each window/home menu item does.

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I could redesign some systems to be more intuitive but a lot of them are a result of the ImGui submodule themselves so making changes would be extremely hard. Plus, the systems do work quite well they just need explaining.