Gui rewrite

[Aedial]

Summary

Completely rewrite the GUI part of the mod, from a monolithic system to a widget hierarchy with concerns delegated to the lowest level (smallest focus). This should make things much more manageable going forward.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Chore/Refactor (no functional changes)
• Documentation update only

What changed

See CHANGELOG.md for 1.5.0

rem From repo root
gradle setupDecompWorkspace
gradle build

Checklist

• I built the project locally with Java 8 using gradle build.
• I updated documentation (README/DEVELOPMENT.md) as needed.
• I followed the existing code style.
• I did not include secrets or private data.
• If touching mcmod.info, it remains valid and accurate.
• I searched for existing PRs/issues that cover this change.

Additional context

Changes to the data backend have been kept minimal, so that part should not need verifying.

[Aedial]

Old visuals

[Aedial]

Now visuals