Handle inverted requirements correctly and update UI

[Dirius77]

About the PR

Made it so that the Inverted setting in requirements applies to their CheckRequirements logic instead of just their reason text. Fixes #127

Also updated the trait UI to grey out and disable traits your requirements don't match for.

Why / Balance

Bugfix + UI Clarity

Technical details

It's a bool. Changed SetInvalid to a more generic UpdateAppearance function that handles the different appearances now.

Test plan

I used the traits from the blood PR to test this, but:
Try to select a trait you can't.
Select one you can.
Switch to a species that wouldn't be able to select that trait.
Verify that you can still UNselect it.

Media

2026-07-08_19-17-57.mp4

Requirements

• I have read and am following the Macrocosm Pull Request Conventions.
• I have tested this pull request and written instructions on how to test it.
• I have added media to this PR or it does not require an in-game showcase.

Licensing

• All code in this pull request can be licensed to MIT.

• (OPTIONAL) I give permission to seeing this feature upstreamed to Macrocosm in the future.

Breaking changes

Changelog