Added channelPlaylists concept

[PaulCombal]

Hello,
This pull request aims to address #105 . It was not heavily tested, and I had no linter. That means it's more a proof-of-concept than anything else, but with a little work, I'm sure it can reach your standards if you wanted to.

This code is functionnal on my side.

Maintainers are allowed to edit this PR.

Thank you for reviewing!

[codecov]

Codecov Report

Merging #106 (0a8108f) into master (0a8108f) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #106   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          255       255           
=========================================
  Hits           255       255           

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[lgtm-com]

This pull request introduces 1 alert when merging 00135f3 into 0a8108f - view on LGTM.com

new alerts:

• 1 for Unused variable, import, function or class