Add progressive enhancement in OOP post

[Bisaloo]

• [x] The post specifies a license if you don't want to use the default CC BY
• [x] All authors have an ORCID iD
• [x] Relevant keywords / tags has been added. In particular, if you want your post to be shared on R-bloggers, you must tag it with R
• [x] Images or other external resources have been committed and pushed
• [x] The post uses pure quarto syntax, rather than HTML or R code, unless necessary

Right before merging:

• [x] The date field has been updated
• [x] All reviewers have been acknowledged in a short paragraph
• [ ] A PR has been opened in the blueprints to link to this post
• [x] The post has been re-rendered and content of the _freeze/ folder is up-to-date

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