Add densmap component

[jakubmajercik]

Changelog

densMAP dimensionality reduction component implemented. Neighbor computing updated to output KNN results as input to densMAP. Test resources need to be updated to include these extra fields in the mudata/anndata objects.

Issue ticket number and link

Closes #739

Checklist before requesting a review

• I have performed a self-review of my code

• Conforms to the Contributor's guide

• Check the correct box. Does this PR contain:

  • Breaking changes
  • New functionality
  • Major changes
  • Minor changes
  • Documentation
  • Bug fixes

• Proposed changes are described in the CHANGELOG.md

• CI tests succeed! - failing due to modified neighbor computing component.

[DriesSchaumont]

@jakubmajercik Seems like something went wrong after you recent updates, care to have a look? 😃

[jakubmajercik]

@jakubmajercik Seems like something went wrong after you recent updates, care to have a look? 😃

The tests fail because neighbors/find_neighbors was also modified so resources_test_scripts/pbmc_1k_protein_v3.sh needs to be rerun so that resources_test/pbmc_1k_protein_v3/pbmc_1k_protein_v3_mms.h5mu is updated. Then it works locally at least :)

[DriesSchaumont]

@jakubmajercik Seems like something went wrong after you recent updates, care to have a look? 😃

The tests fail because neighbors/find_neighbors was also modified so resources_test_scripts/pbmc_1k_protein_v3.sh needs to be rerun so that resources_test/pbmc_1k_protein_v3/pbmc_1k_protein_v3_mms.h5mu is updated. Then it works locally at least :)

Of course! I keep forgetting to update the test resources 👀