Beta diversity tweaks

[Glycocalex]

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Description of Changes

beta diversity output changed to include distance matrix
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Changelog

• I have added my changes to CHANGELOG.md under the appropriate module/submodule section

[codacy-production]

Up to standards ✅

🟢 Issues 1 high · 1 medium

Results:
2 new issues

Category	Results
UnusedCode	1 medium
ErrorProne	1 high

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🟢 Metrics 0 complexity · 0 duplication

Metric	Results
Complexity	✅ 0 (≤ 20 complexity)
Duplication	✅ 0 (≤ 15 duplication)

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_{TIP This summary will be updated as you push new changes. Give us feedback}

[Bribak]

Thank you! Will be a nice improvement

Just a few to-dos here:

• no need to import DataFrame, since we typically just use pd.DataFrame
• no need to import List, since we use the nice typing introduced by Python 3.10
• you don't need to wrap the outputs into a list, just having both outputs in the same return line will output a tuple, which is better
• You'll need to update the test_get_biodiversity unit tests in test_core_functions to deal with this changed output format, so that the tests will run through successfully before I merge:-)