fix: Refactor play tranforming to dogfood steps and fix caching #495
* Re-use lifecycle steps/patch to build diffs
* Break out step generation into own function to simplify logic
* Cache steps instead of play to avoid returning a cached play when data is the same #495
* Replace patch object/patching logic with json-diff-ts as its more robust and actually maintained
* Reduces need to stringify everywhere due to lack of cloning in jsonpatchdiff