Add warning when constructing a PolyCollection/LineCollection with a projection

[philipc2]

Overview

• Adds a warning when a user provides a projection to to_polycollection() and to_linecollection() calls.
• Updates logic to prevent duplicate projection arguments from being passed in, which caused errors

[erogluorhan]

Thanks for this fix! See my simple change requests.

[philipc2]

@erogluorhan

I think the updated warning should be much more informative now. Let me know what you think.

[erogluorhan]

Looks great!