decombinator v5.0.0

[MVCowley]

Decombinator should be pip install compatible and samples with large numbers of UMIs should be handled in less than O(n**2) time.

• [x] Refactor into src directory structure
• [x] Write cshpc scripts that work with installable Decombinator: innate2adaptive/Decombinator-Tools#6
• [x] Add integration tests to ensure functionality stays the same
  • [x] .tsv output
  • [x] .n12 output
  • [x] .freq output
  • [x] Logs output
  • [x] CLI tests
• [x] Collapsinator performance improvements
• [x] Add tests to GitHub actions CI pipeline for 3.9 to 3.12
• [x] Production testing

[MVCowley]

Note: builds are currently failing due to dependency on an unreleased version of pyrepseq. I will revert to a draft PR before the next push if the status has not changed.