Added with_slice, updated logos example

[zesterer]

Currently unsound if passed an incorrectly sized slice.

[Amejonah1200]

It would be nice to have also a lasso integration. This would allow making calls like ident().intern() possible.

[Zij-IT]

It would be nice to have also a lasso integration. This would allow making calls like ident().intern() possible.

Would this not be equivalent to:

ident().map_with_state(|i, _, rodeo: &Rodeo| rodeo.get_or_intern(i))

[Amejonah1200]

It would be nice to have also a lasso integration. This would allow making calls like ident().intern() possible.

Would this not be equivalent to:

ident().map_with_state(|i, _, rodeo: &Rodeo| rodeo.get_or_intern(i))

Yes, I will use trait extensions for that then.