Add a type to the events, which can be MIDI1 or UMP.
Add debug functions for UMP messages.
midifile only supports saving MIDI1 format files for now. It will convert
to MIDI1 when asked to write an UMP message.
In pw-cat, convert the MIDI1 messages to UMP before sending into the
graph.
Library code generally shouldn't modify global state, so pw_init()
should not result to changing the C locale.
Instead, set the C locale in main() for tools and daemons.
We'll still setlocale for LC_MESSAGES, to get translated UI elements in
wireplumber. This workaround should be removed eventually...
Make all tools output to stdout (pw-mon mostly) so that we can pipe the
output around.
Send errors to stderr.
fprintf(stdout, ...) -> printf(...)
setlinebuf for stdout so that pipe works better.
See #2110
