implement instrument similarities in front end

[Jamesren64]

Description

Add instrument-to-instrument similarity metrics (F1, Precision, Recall) to Results.

Pass through instrument_to_instrument_similarities in src/utilities/simplifyApi.js as instrumentSimilarities.
Render InstrumentSimilarities card in src/components/InstrumentSimilarities.js with percent formatting. Show card in src/components/Results.js when data exists.

Dependencies:
Backend must return instrument_to_instrument_similarities with { instrument_1_name, instrument_2_name, precision, recall, f1 }.
No new npm packages.

Fixes # (issue)

#43

Type of change

New feature (non-breaking change which adds functionality)

Testing

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Local end to end test.

Test Configuration

• Library version:
• OS:
• Toolchain:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

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