fix: restore the Equals/GetHashCode contract on B2Vec2 - #95

Field 'Doohickey.m_sliderId' is never assigned to, and will always have its default value

The variable 'ph' is assigned but its value is never used

The variable 'pw' is assigned but its value is never used

The variable 'fileBufferCapacity' is assigned but its value is never used

The variable 'noWalkSteer' is assigned but its value is never used

Comparison made to same variable; did you mean to compare something else?

Comparison made to same variable; did you mean to compare something else?

Comparing a span to 'null' might be redundant, the 'null' literal will be implicitly converted to a 'Span<T>.Empty' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2265)

Unreachable code detected