add debug info to static protoid in generic class error

[deltanedas]

for this example pseudocode:

public sealed class EpicSystem<TComp> : EntitySystem
{
    public static readonly ProtoId<ShaderPrototype> SomeShader = "Hello";
}

currently when validating protoids you get a useless exception with 0 information whatsoever
this pr makes it so you have the protoid type and the field name, which makes fixing the issue fairly trivial

Field Robust.Shared.Prototypes.ProtoId`1[Robust.Client.Graphics.ShaderPrototype] SomeShader cannot be a static field inside a generic class