Add zsh completions for kdesrc-build & kdesrc-run
There's one reusable autoloaded completer for module names, and two actual completion files. kdesrc-build supports all the options listed in its --help output. kdesrc-run, on the other hand, is designed to provide completions for whatever program is being launched though it, be it either implicit by matching module name, or explicit binary name specified via --exec option.
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)