By default system-lua=false, so the bundled version is built.

The default_library for the lua subproject is also set to static
now, so that we don't need to install liblua and mess up the system.
For existing build trees, this needs to be switched manually now with
-Dlua:default_library=static (or just wipe the build dir and start clean)

pipewire.conf uses a different format now

Required for the device event type-info

Depends on DeviceEvent type-info, available on pipewire master as of today

deactivate() is normally called from WpCore's dispose() and
that's too late to convert a weak WpCore ref to a strong one,
so we cannot find the WpConfiguration and remove the engine.
So, keep a reference to the WpConfiguration earlier.

If the engine is not stopped on time, proxies on the export_core
are destroyed after their core and pipewire complains

WpDevice, WpSpaDevice, WpNode, WpImplNode, WpObject and object features

port module-monitor to follow the changes

A new desktop profile without endpoints will be added.
The goal is to be compatible with media-session in the short term

Use the unused 'K' format letter in the varargs builder & parser methods

* Use a more complete API to introspect SPA types
* Avoid the need for the Tables enumeration; the tables
  are now registered with a string
* Avoid the need for initialization, work directly on spa_types
  and other static data
* Allow working with Object pods that are not Params;
  the PARAMS table was previously hardcoded in the pod implementation
* Add a different dynamic type registration system, closer to
  how spa type works. The only regression is that we can no longer
  register additional custom object fields (custom SPA_PROP_* for example),
  but this feature can be re-added later

Still missing a way to get the default endpoints, but this
is going to change and use the metadata API

... and make WpIterator Lua-friendly so that it can be used
with the generic for loop