Add TryCollect and Collect2 consumers and remove CollectErr

Support Map in itx to allow limited chaining

Add Transform iter to itx

Transform is a limited form of Map where the argument type is the same as
the return type, allowing it to be chained.

Upgrade Go in CI to 1.23rc2

Move chaining iterators to itx package

change test workflow branch

Adapt project to current 1.23 iter API (#106)

Adapt project to current 1.23 iter API

Please provide a brief description of the change.

- All iterators now natively return and use the Seq types rather than this projects type alias, favouring compatibility with the standard library over convenience features like chaining.
- Added iterators for the Seq2 variants of existing iterators
- Renamed Lift to Values and moved to future shadow package slices (to be deleted when Go 1.23 is released)
- Renamed LiftHashMap to All and moved to future shadow package maps (to be deleted when Go 1.23 is released)

Add Zip to v2

Implement Count, Take, Lift and Collect for rangefunc

Support Stringer for remaining iters