Enable more Code Quality Rules

[RoosterDragon]

Following on from #20802

Enforces 5 code quality rules across the project.

I have batched together a PR for these rules as they each had some but not too many violating files.

See https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ for explanation of each rule.

[PunkPun]

I don't agree with CA1816. All these classes should be inheritable.

[pchote]

For things like traits I wouldn't necessarily disagree, but the cases here are internal engine types that don't make much sense to subclass (with the exception of Map, but that can be unsealed if/when needed).

[RoosterDragon]

For CA1816 I don't see a good reason to allow inheritance for any of them. They've got no protected or virtual methods, they've got no behaviour a derived class could customize (except ToString, anyway). There's nothing code wanting to make use of the class couldn't already achieve via composition.

[PunkPun]

Changelog