Move docs to Antora

[mborland]

Closes: #286

[cppalliance-bot]

An automated preview of the documentation is available at https://291.int128.prtest3.cppalliance.org/libs/int128/doc/html/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-01-15 21:01:19 UTC

[mborland]

@sdarwin Are you able to see why the doc preview is 404ing? Locally my doc build has html/index.html and then the rest of the files are in html/int128 as expected. This PR is basically the same changes that have been applied to Decimal and Multi when they transitioned over from Asciidoc to Antora. Thanks for the help.

[sdarwin]

The previews must be set to either 'antora' or 'standard'.
Try now: https://291.int128.prtest3.cppalliance.org/libs/int128/doc/html/index.html

[mborland]

The previews must be set to either 'antora' or 'standard'. Try now: https://291.int128.prtest3.cppalliance.org/libs/int128/doc/html/index.html

Looks good. Thanks again.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.57%. Comparing base (ea0f85e) to head (9236634).
⚠️ Report is 18 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #291   +/-   ##
========================================
  Coverage    99.57%   99.57%           
========================================
  Files           54       54           
  Lines         4929     4929           
  Branches      1429     1429           
========================================
  Hits          4908     4908           
  Misses          21       21           

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