feat: Enable viewing of diffs for Statements

[evyncke]

Addressing #9021 by making statement-* docs 'diffable'

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.73%. Comparing base (e16d568) to head (4ef7b5f).
⚠️ Report is 114 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9180   +/-   ##
=======================================
  Coverage   88.72%   88.73%           
=======================================
  Files         321      321           
  Lines       41851    41860    +9     
=======================================
+ Hits        37134    37144   +10     
+ Misses       4717     4716    -1     

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[rjsparks]

There will have to be explicit support added to author-tools before we can merge this.
@kesara - could you look at whether it would be reasonable to handle requests like:

https://author-tools.ietf.org/iddiff?url1=statement-iesg-ballot-procedures-for-documents-00&url2=statement-iesg-ballot-procedures-for-documents-01&difftype=--html

[kesara]

There will have to be explicit support added to author-tools before we can merge this. @kesara - could you look at whether it would be reasonable to handle requests like:

https://author-tools.ietf.org/iddiff?url1=statement-iesg-ballot-procedures-for-documents-00&url2=statement-iesg-ballot-procedures-for-documents-01&difftype=--html

At the moment author tools doesn't know about statements.
How do you get a text or markdown of a statement from DT?
For example, I don't see a way to get text statement for https://datatracker.ietf.org/doc/statement-iesg-ballot-procedures-for-documents/01/

[evyncke]

So, it seems that a .TXT should be generated when a new .MD statement is issued ?

OTOH, comparing the .MD would probably be "good enough"

[rjsparks]

md should be compared to md when it exists.

[kesara]

@rjsparks, But does DT expose md or txt files for statements?

[evyncke]

Any news about DT exposing somewhere the .MD for the statements ? Else, I could try to code one.

[rjsparks]

(this may be a duplicate):
There is no simple endpoint for fetching the raw markdown of a statement.
There is an ongoing conversation at #6599 on how to do this generally, and statements should follow the outcome of that.