Add zsh completions for plasmoidviewer
Supports all the (non-generic-Qt) command line options, provides meaningful completion contexts, completes applets, containments and themes from lists of actually packages, as well as plain fixed lists of choices like location and form-factor.
Note: it uses the new variable KDE_INSTALL_ZSHAUTOCOMPLETEDIR, which is to be added in ECM 5.101.
Read more: frameworks/extra-cmake-modules!310 (merged)