Support "logging" section to allow per-service log level changes

[lbt]

Add a "logging" section to the config to allow per-service log levels to be set.

Added comments and documentation,
If we should be doing a dict merge then maybe that's worth considering

[goldyfruit]

Adding this feature back to OVOS would be nice as well: MycroftAI/mycroft-core@0247b3a

Or maybe a more natural JSON log format option. (json, text)

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.03% ⚠️

Comparison is base (22bf10c) 28.43% compared to head (46654ae) 28.41%.
Report is 2 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #189      +/-   ##
==========================================
- Coverage   28.43%   28.41%   -0.03%     
==========================================
  Files          49       49              
  Lines        6491     6496       +5     
==========================================
  Hits         1846     1846              
- Misses       4645     4650       +5     

Files Changed	Coverage Δ
ovos_utils/log.py	81.56% <0.00%> (-3.00%)	⬇️
ovos_utils/version.py	0.00% <0.00%> (ø)

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[JarbasAl]

thanks for the contribution! this is a simple but very useful addition