* Add support for prefers-color-scheme using Bootstrap classes.
* Move stylesheet changes to separate javascript file.
* fix(html): don't specify the integrity hash in the tag for style.js
* fix(log): debug-log integrity hashes for troubleshooting
* fix(css): move to using bootstrap standard variables for colours and theming
* fix(js): rewrite to simplify and use standard bootstrap functionality
* fix(makefile): codespell thingie was complaining
* run prettier on css/js.
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Co-authored-by: James Hodgkinson <james@terminaloutcomes.com>
