Add sa module

[lowlydba]

Description

Add a module for hardening the sa login.

Also a bug fix for the login module.

Do not merge until https://github.com/dataplat/dbatools/pull/8289 is landed & the LoginName/Name defaults in the integration tests can be cleaned up.

How Has This Been Tested?

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue) - Fixes #
• [x] New feature (non-breaking change which adds functionality) - Resolves #50

Checklist:

• [x] I have read/followed the CONTRIBUTING document.
• [x] I have read/followed the PR Quick Start Guide # TODO: update with link to published doc
• [x] I have added tests to cover my changes or they are N/A.
• [x] New module options/parameters include a version_added property.

[github-actions[bot]]

Docs Build 📝

Thank you for contribution!✨

This PR has been merged and the docs are now incorporated into main.

[codecov-commenter]

Codecov Report

Merging #55 (792debd) into main (da4a65c) will increase coverage by 0.22%. The diff coverage is 96.34%.

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   95.00%   95.22%   +0.22%     
==========================================
  Files          35       37       +2     
  Lines        1021     1090      +69     
==========================================
+ Hits          970     1038      +68     
- Misses         51       52       +1     

Impacted Files	Coverage Δ
plugins/modules/login.ps1	96.59% <90.47%> (+0.34%)	:arrow_up:
plugins/modules/sa.ps1	98.27% <98.27%> (ø)
plugins/modules/sa.py	100.00% <100.00%> (ø)

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