feat: Add bibxml button to document info page

[pselkirk]

Fixes #5908

[codecov]

Codecov Report

Merging #5921 (b64ce96) into main (09f3477) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #5921   +/-   ##
=======================================
  Coverage   88.67%   88.67%           
=======================================
  Files         288      288           
  Lines       40001    40002    +1     
=======================================
+ Hits        35471    35472    +1     
  Misses       4530     4530           

Impacted Files	Coverage Δ
ietf/doc/utils.py	87.15% <100.00%> (+0.01%)	⬆️

... and 2 files with indirect coverage changes

[rjsparks]

I continue to have misgivings about not pointing to bib.ietf.org right away.
@kesara - could I get a second opinion?

[kesara]

I continue to have misgivings about not pointing to bib.ietf.org right away.

@kesara - could I get a second opinion?

There's a delay of about ~3 hours for new BibXML entries to be available of bib.ietf.org.

[rjsparks]

ok - we'll go with this for now then.