Restructuring

[sr-murthy]

• Tidy up pre-commit and test workflows ✅
• An additional build workflow (build.yml) for building package artifacts (sdist, wheel) and a simple test of installing the package from the locally built wheel and testing its import with Python ✅
• Use sensible runner timeouts for all jobs ✅
• Upgrade all actions and pin them to full commit SHAs ✅
• Tidy up project metadata in project TOML ✅
• Update README ⏳
• Tidy up and restructure core libs ✅
• More unit tests + coverage reporting improvements ✅
• Update Sphinx docs conf and add API reference to contents - RTD site (via PR build) accessible here ✅

[codecov]

Codecov Report

❌ Patch coverage is 37.97468% with 196 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
isaricanalytics/analytics.py	27.04%	116 Missing ⚠️
isaricanalytics/redcap_data.py	35.71%	72 Missing ⚠️
isaricanalytics/visualisation.py	75.00%	7 Missing ⚠️
isaricanalytics/utils.py	93.75%	1 Missing ⚠️

Files with missing lines	Coverage Δ
isaricanalytics/__init__.py	100.00% <100.00%> (ø)
isaricanalytics/utils.py	93.75% <93.75%> (ø)
isaricanalytics/visualisation.py	60.10% <75.00%> (ø)
isaricanalytics/redcap_data.py	11.72% <35.71%> (ø)
isaricanalytics/analytics.py	11.33% <27.04%> (ø)

... and 1 file with indirect coverage changes

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