pre-commit: enable markdownlint rule `MD012`

[jbampton]

MD012 no-multiple-blanks - Multiple consecutive blank lines

https://github.com/DavidAnson/markdownlint/blob/main/doc/md012.md

Description

This PR cleans up and standardizes the Markdown files.

Types of changes

• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Enhancement (improves an existing feature and functionality)
• [X] Cleanup (Code refactoring and cleanup, that may add test cases)
• [ ] build/CI
• [ ] test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• [ ] Major
• [ ] Minor

Bug Severity

• [ ] BLOCKER
• [ ] Critical
• [ ] Major
• [ ] Minor
• [ ] Trivial

Screenshots (if appropriate):

How Has This Been Tested?

Ran locally:

pre-commit run --all-files

How did you try to break this feature and the system with this change?

[codecov[bot]]

Codecov Report

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

Project coverage is 16.06%. Comparing base (631bba2) to head (06d67eb). Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #9364      +/-   ##
============================================
- Coverage     16.06%   16.06%   -0.01%     
+ Complexity    12872    12871       -1     
============================================
  Files          5642     5642              
  Lines        493973   493973              
  Branches      59895    59895              
============================================
- Hits          79351    79350       -1     
- Misses       405837   405838       +1     
  Partials       8785     8785              

Flag	Coverage Δ
uitests	4.01% <ø> (ø)
unittests	16.90% <ø> (-0.01%)	:arrow_down:

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[jbampton]

@blueorangutan package

[blueorangutan]

@jbampton a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 11336

[jbampton]

@blueorangutan package

[blueorangutan]

@jbampton a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✖️ el8 ✖️ el9 ✖️ debian ✖️ suse15. SL-JID 11868

[jbampton]

@blueorangutan package

[blueorangutan]

@jbampton a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 11902