fix: blacklisted skills

[JarbasAl]

closes #383

missed in #313 apparently

logs should have

2024-02-28 22:01:00.559 - skills - ovos_core.skill_manager:_load_on_startup:540 - INFO - Loading offline skills...
2024-02-28 22:01:03.834 - skills - ovos_core.skill_manager:load_plugin_skills:334 - WARNING - skill-ovos-stop.openvoiceos is blacklisted, it will NOT be loaded
2024-02-28 22:01:03.834 - skills - ovos_core.skill_manager:load_plugin_skills:335 - INFO - Consider uninstalling skill-ovos-stop.openvoiceos instead of blacklisting it

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 63.85%. Comparing base (20689d1) to head (1088097).

Files	Patch %	Lines
ovos_core/skill_manager.py	25.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #424      +/-   ##
==========================================
- Coverage   64.12%   63.85%   -0.28%     
==========================================
  Files          15       15              
  Lines        2570     2584      +14     
==========================================
+ Hits         1648     1650       +2     
- Misses        922      934      +12     

Flag	Coverage Δ
unittests	63.85% <25.00%> (-0.28%)	⬇️

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[mikejgray]

Also some tests would be awesome here, so coverage doesn't drop while we're targeting 75% 🙂