Fix circular dependencies

[thornbill]

Updates a bunch of imports and moves some constants to dedicated files to avoid circular dependencies

Fixes #425

[codecov-commenter]

Codecov Report

Merging #434 (d00c378) into master (0c55c31) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #434   +/-   ##
=======================================
  Coverage   99.79%   99.79%           
=======================================
  Files          78       80    +2     
  Lines         483      488    +5     
  Branches       48       48           
=======================================
+ Hits          482      487    +5     
  Misses          1        1           

Impacted Files	Coverage Δ
src/discovery/discovery-service.ts	100.00% <100.00%> (ø)
src/discovery/recommended-server-discovery.ts	100.00% <100.00%> (ø)
src/jellyfin.ts	100.00% <100.00%> (ø)
src/utils/url/constants.ts	100.00% <100.00%> (ø)
src/utils/url/index.ts	100.00% <100.00%> (ø)
src/utils/url/normalize-url.ts	100.00% <100.00%> (ø)
src/versions.ts	100.00% <100.00%> (ø)

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[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
3.5% Duplication