Terraria: 1.4.4 and Calamity support

[Seldom-SE]

What is this fixing or adding?

For the Terraria world:

• Terraria 1.4.4 support
• Calamity mod support
• getfixedboi (1.4.4 secret seed) support
• Expanded achievement locations options and made them more flexible
• Made Checks.py easier to maintain

The achievements options were a mutually exclusive list including "None", "Exclude Grindy", "Exclude Fishing", and "All". But now, they're a list of booleans that can be toggled independently, including "Early Pre-Hardmode achievements", "Normal achievements", "Grindy achievements", and "Fishing quest achievements".

How was this tested?

5 public testing releases and my own test runs

If this makes graphical changes, please attach screenshots.

Behold, options!

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Sorry for the mega-PR.

I've talked to a Calamity dev about having them release a separate mod on the workshop that's just Calamity, but it stays on whatever version we support. If that ends up happening, I'll make a follow-up PR updating the docs accordingly.

[Seldom-SE]

Thanks for the reviews, y'all. I'll get to them when I can, but I've been busy