Annotate GUI Module and refactor resource resolution

[NeonDaniel]

Continuation of #157
Cleanup docstrings and type annotations in gui module
Refactor so resources from GUI plugins take priority over core resources

[codecov]

Codecov Report

Merging #158 (c76b359) into dev (57f7909) will not change coverage.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##             dev    #158    +/-   ##
======================================
  Coverage   0.00%   0.00%            
======================================
  Files         47      49     +2     
  Lines       5482    6330   +848     
======================================
- Misses      5482    6330   +848     

Impacted Files	Coverage Δ
ovos_utils/__init__.py	0.00% <0.00%> (ø)
ovos_utils/bracket_expansion.py	0.00% <0.00%> (ø)
ovos_utils/configuration.py	0.00% <0.00%> (ø)
ovos_utils/device_input.py	0.00% <0.00%> (ø)
ovos_utils/dialog.py	0.00% <0.00%> (ø)
ovos_utils/enclosure/__init__.py	0.00% <0.00%> (ø)
ovos_utils/enclosure/api.py	0.00% <0.00%> (ø)
ovos_utils/events.py	0.00% <0.00%> (ø)
ovos_utils/file_utils.py	0.00% <0.00%> (ø)
ovos_utils/fingerprinting.py	0.00% <0.00%> (ø)
... and 27 more