Remove API.md and jsdom/dompurify/marked dependencies (#477)

* Initial plan

* Remove API.md and jsdom/dompurify/marked packages

Co-authored-by: thehabes <3287006+thehabes@users.noreply.github.com>

* changes during review

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: thehabes <3287006+thehabes@users.noreply.github.com>
Co-authored-by: Bryan Haberberger <bryan.j.haberberger@slu.edu>

Author: Copilot