[27.x backport] assorted docs updates

[thaJeztah]

backport:

• https://github.com/docker/cli/pull/5507
• https://github.com/docker/cli/pull/5591
• https://github.com/docker/cli/pull/5595

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.37%. Comparing base (e15a979) to head (2734299). Report is 11 commits behind head on 27.x.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 27.x #5612 +/- ## ========================================== - Coverage 58.65% 58.37% -0.28% ========================================== Files 345 336 -9 Lines 29053 28781 -272 ========================================== - Hits 17040 16800 -240 + Misses 11042 11013 -29 + Partials 971 968 -3 ```