bring back some features: dedicated apppend icon, dont autoclose mainplaylist in modal mode, correctly create cache directory in android, add save list to mainplaylist

multiple fixes: make use of url for detecting local from other remote urls, also better albums delegates and quick fixes

Summary:
Introduces a CMake-based build system that is compatible with
binary-factory.kde.org and works like the rest of KDE applications.
It doesn't make use of the taglib here but fetches the sources on build
time on android. For other platforms it will look for the dependency in
the system like the rest of depedencencies.

Test Plan: Can build both using cmake and qmake on linux and android.

Reviewers: camiloh

Reviewed By: camiloh

Differential Revision: https://phabricator.kde.org/D12286

solve sh*tload of problems on initial scan and move away from kirigami desktop style to material ultil issues get solved