[Document] Update cli.py to add some comments

[kentwelcome]

PR checklist

• [x] Ensure you have added or ran the appropriate tests for your PR.
• [x] DCO signed

What type of PR is this? Document

What this PR does / why we need it:

• Add some comments to explain the feature flag of --enable-quick-look-share implemented by #889

Which issue(s) this PR fixes: sc-32292

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

Merging #911 (a1fd553) into main (bf71b4a) will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #911   +/-   ##
=======================================
  Coverage   47.94%   47.95%           
=======================================
  Files          77       77           
  Lines       10740    10740           
=======================================
+ Hits         5149     5150    +1     
+ Misses       5591     5590    -1     

Files	Coverage Δ
piperider_cli/cli.py	67.59% <ø> (ø)

... and 1 file with indirect coverage changes

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