refactor: restructure source code

[ReenigneArcher]

Description

Changes mostly based on LizardByte/Themerr-plex#497

In the future maybe we can combine these into one project...

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

[codecov]

Codecov Report

Attention: Patch coverage is 62.40000% with 47 lines in your changes missing coverage. Please review.

Project coverage is 66.19%. Comparing base (01d4d90) to head (5457d27).

Files	Patch %	Lines
src/retroarcher.py	0.00%	23 Missing ⚠️
src/common/webapp.py	60.97%	16 Missing ⚠️
src/common/config.py	73.07%	7 Missing ⚠️
src/common/__init__.py	80.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (01d4d90) and HEAD (5457d27). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (01d4d90)	HEAD (5457d27)
Windows-x64	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #584      +/-   ##
==========================================
- Coverage   74.03%   66.19%   -7.84%     
==========================================
  Files          10       11       +1     
  Lines         905     1056     +151     
==========================================
+ Hits          670      699      +29     
- Misses        235      357     +122     

Flag	Coverage Δ
Linux-x64	62.40% <60.80%> (-7.21%)	⬇️
Windows-x64	?
Windows-x86	65.53% <62.40%> (-7.73%)	⬇️
macOS-x64	65.71% <62.40%> (-7.77%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/common/definitions.py	83.33% <100.00%> (ø)
src/common/hardware.py	78.26% <100.00%> (ø)
src/common/helpers.py	70.58% <ø> (ø)
src/common/locales.py	83.72% <100.00%> (ø)
src/common/logger.py	61.03% <100.00%> (ø)
src/common/threads.py	100.00% <ø> (ø)
src/common/tray_icon.py	83.03% <100.00%> (ø)
src/common/__init__.py	63.63% <80.00%> (ø)
src/common/config.py	80.73% <73.07%> (ø)
src/common/webapp.py	70.14% <60.97%> (ø)
... and 1 more

[sonarcloud]

Quality Gate failed

Failed conditions
31 New issues
4 Security Hotspots
31 New Code Smells (required ≤ 0)

See analysis details on SonarCloud

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