When KWin compat is active, GetWindows() only returned XWayland windows
since it relied on X11's _NET_CLIENT_LIST. Native Wayland windows were
invisible to conditions even though GetCurrentWindowTitle() reported them
correctly via the KWin DBus notifier.
The "core" macro conditions and actions have been extracted out to the
"base" plugin.
The library now mostly contains functionality which is required across
all plugins and (e.g. definitions for macro segments).
The goal is to reduce the complexity and cross-dependencies and group
the source files in a better way.
This should relsove the "library limit of 65535 objects exceeded" build
issue occuring in some Windows build environments.
