📝 [#2626] Add beheerhandleiding to ReadTheDocs

[jiromaykin]

issue: https://taiga.maykinmedia.nl/project/open-inwoner/task/2626

(Running Sphinx): After 'make HTML' the .rst files, with their embedded images, can be viewed in browser.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.12%. Comparing base (c891aba) to head (1cf2293).
Report is 26 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1309      +/-   ##
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- Coverage    95.13%   95.12%   -0.02%     
===========================================
  Files          983      990       +7     
  Lines        35847    35769      -78     
===========================================
- Hits         34104    34026      -78     
  Misses        1743     1743              

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[jiromaykin]

@pi-sigma and @swrichards : I added the beheerdershandleiding as the first thing in the hierarchy index because it's in Dutch. And I've used the numbering of the PDF for the chapters/headings - which is also why 'inleiding' is chapter 1 and 'index' is chapter Zero, since I wanted the title in the main and visible index to be 'beheerhandleiding' instead of 'inleiding'. But feel free to suggest otherwise!

[swrichards]

Good job on not the most enjoyable of chores!

[pi-sigma]

Looks good to me. One thing I noticed is that the copyright still says "Maykin Media"; should be "Maykin" instead. It's a small change, but perhaps should be done in a separate commit/PR.

[jiromaykin]

@pi-sigma I've removed the 'media' from our company name in this documentation at least 🙂