chore(login): improve --password flag description with security guidance

[gcharpe1604]

Description

The --password / -p flag in harbor login had a minimal description (Password) that gave users no indication of the shell history security risk. Updated the description to guide users toward the safer --password-stdin alternative, following the same convention used by docker login.

• Fixes [feature]: improve --password flag description with security guidance in login command #854

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation update
• Chore / maintenance

Changes

• Updated --password flag description in cmd/harbor/root/login.go to warn about shell history exposure and recommend --password-stdin
• Added -n short flag for --context-name in harbor login command
• Updated doc/cli-docs/harbor-login.md to reflect the new flag description and the new -n short flag
• Updated doc/man-docs/man1/harbor-login.1 to reflect the new flag description and the new -n short flag

Testing

$ harbor login --help

-p, --password string Password (not recommended, use --password-stdin for better security)

[qcserestipy]

Thanks for the contribution! Adding the docs is nice. However, this PR also introduces changes to the short flag of the cli login context-name. Please update the PR description to also cover this point.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 8.80%. Comparing base (60ad0bd) to head (94031ed).
⚠️ Report is 159 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##             main    #855      +/-   ##
=========================================
- Coverage   10.99%   8.80%   -2.19%     
=========================================
  Files         173     280     +107     
  Lines        8671   13965    +5294     
=========================================
+ Hits          953    1230     +277     
- Misses       7612   12618    +5006     
- Partials      106     117      +11     

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[gcharpe1604]

Hi @qcserestipy, thanks for the review!
I've updated the PR description to also cover the addition of the -n short flag for context-name as requested. Let me know if there's anything else needed!

[qcserestipy]

LGTM, however cmd.MarkFlagsMutuallyExclusive("password", "password-stdin") is there now twice.

[gcharpe1604]

@qcserestipy Thank you for the review!
I have updated the branch to remove the duplicate cmd.MarkFlagsMutuallyExclusive("password", "password-stdin") declaration as requested. I've also ensured the PR is cleanly rebased and up to date with the latest main.

Let me know if there's anything else needed or if this is good to go!

[qcserestipy]

LGTM, thank you for your contribution!

[gcharpe1604]

@qcserestipy Thank you for reviewing and approving the PR!!