Add new NET10 target without dependency on `System.Linq.Async`

[mikkelbu]

We have started to migrate our repos to .NET10 and some of our projects rely on NPoco. As .NET10 comes with System.Linq.Async inbuilt it would preferably, if there existed a .NET10 target in NPoco without this dependency to avoid ambiguities.

[ahazelwood]

Yes. I just ran into this issue as well. For net10 there is now a System.Linq.AsyncEnumerable library that implements the same functionality and is a breaking change for .net 10.