replace slicer recipe cache with a slot aware recipe cache

[agnor99]

Description

Swap out the recipe cache for the slicer to one that cares about slot indices
Closes #384

Checklist:

• My code follows the style guidelines of this project (.editorconfig, most IDEs will use this for you).
• I have performed a self-review of my own code.
• I have commented my code in areas it may be challenging to understand.
• I have made corresponding changes to the documentation.
• My changes are ready for review from a contributor.

[Rover656]

I might've suggested making this more generic, but this fix looks like it works perfectly fine at the minute, so no need to complicate things. Thanks a lot agnor :)