Collect the list of object properties into a single place.
Group properties in the index based on the object type. Consider
"Monitor" as a separate object type, as it's generally configured
separately.
Add something about Port, Link, and Client properties. Just explain some
of these as they're fairly technical, so just link to API docs.
Fix some copypaste mistakes and other errors.
Add explanations for some more properties. Explain "drop-in" config
files. Explain filter-chain.conf.
Move configuration man pages under Configuration in TOC.
Add reference documentation for configuration settings & node/device
properties. We should have boring & exhaustive reference lists of all
the options, and an index where they can be looked up as needed.
The content is mostly stolen from the Wiki.
Add pipewire-client.conf.5, pipewire-jack.conf.5, and pipewire-device.7
that try to explain all available configuration settings for native/ALSA/JACK
clients, and parameters & properties devices.
Expand pipewire.conf.5 and pipewire-pulse.conf.5 with lists of supported
properties. Also explain environment variables.
Doxygen doesn't have an indexing mechanism suitable for configuration
settings, so add a simple one using an input filter and use it here.
Tweak styling a bit.
Add pointer for readers to Wiki and WirePlumber docs, where the
documentation actually is at, so the configuration docs can found
starting from docs.pipewire.org
