Refactor state management

[MikuroXina]

Separated from #790. This is a preparation to fix components which depend on the state system.

[codecov-commenter]

Codecov Report

Base: 88.27% // Head: 87.46% // Decreases project coverage by -0.80% ⚠️

Coverage data is based on head (76a0191) compared to base (8ad76a5).
Patch coverage: 73.25% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #805      +/-   ##
==========================================
- Coverage   88.27%   87.46%   -0.81%     
==========================================
  Files         175      178       +3     
  Lines        5295     5395     +100     
  Branches      271      302      +31     
==========================================
+ Hits         4674     4719      +45     
- Misses        586      635      +49     
- Partials       35       41       +6     

Impacted Files	Coverage Δ
bemuse/src/app/redux/collectionLoader.ts	61.53% <61.53%> (ø)
bemuse/src/app/entities/Options.ts	63.69% <63.69%> (ø)
bemuse/src/app/redux/optionsStorageMiddleware.ts	64.28% <64.28%> (ø)
bemuse/src/app/entities/MusicSearchText.ts	76.92% <76.92%> (ø)
bemuse/src/app/redux/ReduxState.ts	77.77% <77.77%> (ø)
bemuse/src/app/entities/MusicSelection.ts	80.00% <80.00%> (ø)
bemuse/src/app/redux/configureStore.ts	80.00% <80.00%> (ø)
bemuse/src/app/redux/collectionFetchMiddleware.ts	81.81% <81.81%> (ø)
bemuse/src/app/entities/LoadState.ts	88.23% <88.23%> (ø)
bemuse/src/app/entities/Collections.ts	100.00% <100.00%> (ø)
... and 5 more

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

No Coverage information
0.0% Duplication

[dtinth]

This is great! Many thanks for converting the custom Redux framework (createReducer) to use something more standardized like Redux Toolkit. This has put the codebase is a much better shape.