Settings: decode PLISTs

• Define structures for settings found in PLIST files.
• Create a decoder that can read them from PLIST files.
• Create a unit test for the decoder.

This MR does not add any code that is executed within the application.

approved this merge request

added 2 commits

• 46916bf1 - 1 commit from branch videolan:master
• 2d05684e - Create and test PreferenceSetting.

Compare with previous version

enabled an automatic merge when all merge checks for 2d05684e pass

aborted the automatic merge because target branch was updated

added 2 commits

• 906d4c8b - 1 commit from branch videolan:master
• ace0011e - Create and test PreferenceSetting.

Compare with previous version

added 2 commits

• a42b761c - 1 commit from branch videolan:master
• 38147c4a - Create and test PreferenceSetting.

Compare with previous version

added 7 commits

• 38147c4a...db273614 - 6 commits from branch videolan:master
• 88c7336c - Create and test PreferenceSetting.

Compare with previous version