UI, Tabs as GameObjects

[baliame]

Adds SMODS.Tab GameObject. Does nothing on its own, but objectifies tab-based dialog rendering. Implements Run Info and Deck Info as tab groups, allowing mods to add their own tabs quickly.

Additional Info:

• I didn't modify api's or I've made a PR to the wiki repo.
• I didn't modify api's or I've updated lsp definitions.
• I didn't make new lovely files or all new lovely files have appropriate priority.

[baliame]

This should be ready for review again, I'm not planning to add more UI classes until someone tells me if we even want this direction.

[english5040]

Hello- looks like no one's reviewing your PR. I see your PR, it seems that people are just busy.

I definitely like the general idea. I'll take a deeper look when I have time