doc: make all manpages with Doxygen

Use (fixed-up) Doxygen manpage output for all program & module manpages.

This also allows formatting the manual pages properly in the HTML docs.

The Markdown pages work properly only with Doxygen >= 1.9.7, older
versions put them to wrong place in the HTML docs.

doc/dox/programs/pipewire-pulse.1.md

@@ -0,0 +1,40 @@
+\page page_man_pipewire-pulse_1 pipewire-pulse
+
+The PipeWire PulseAudio replacement
+
+# SYNOPSIS
+
+**pipewire-pulse** \[*options*\]
+
+# DESCRIPTION
+
+**pipewire-pulse** starts a PulseAudio-compatible daemon that integrates
+with the PipeWire media server, by running a pipewire process through a
+systemd service. This daemon is a drop-in replacement for the PulseAudio
+daemon.
+
+# OPTIONS
+
+\par -h | \--help
+Show help.
+
+\par -v | \--verbose
+Increase the verbosity by one level. This option may be specified
+multiple times.
+
+\par \--version
+Show version information.
+
+\par -c | \--config=FILE
+Load the given config file (Default: pipewire-pulse.conf).
+
+# AUTHORS
+
+The PipeWire Developers <$(PACKAGE_BUGREPORT)>;
+PipeWire is available from <$(PACKAGE_URL)>
+
+# SEE ALSO
+
+\ref page_man_pipewire-pulse_conf_5 "pipewire-pulse.conf(5)",
+\ref page_man_pipewire_1 "pipewire(1)",
+\ref page_man_pipewire-pulse-modules_7 "pipewire-pulse-modules(7)"