Add an extension trait for `TypeIdMap` to query values using generics

[Shatur]

What problem does this solve or what need does it fill?

I can get values from TypeIdMap like this:

map.get(&TypeId::of::<MyType>());
map.remove(TypeId::of::<MyType>());

But it's not very ergonomic and requires importing TypeId.

What solution would you like?

Since we already have an alias with faster hasher, I'd suggest to create an extension trait to allow the following:

map.get_type:<MyType>();
map.remove_type:<MyType>();

And maybe for other similar methods.

[theotherphil]

@Shatur are you planning on implementing this yourself? I’m happy to take it if not.

[Shatur]

@theotherphil no, feel free to take it!