Example script to prepare the session to record

Example script to prepare the session to record

Often one needs to make sure that all the relevant settings are made
before one actually starts recording. The Lua interface can take care of
this task easily, that the operater by just one action can make sure
that the relevant settings (e.g. recenables, playhead position, etc.)
are ready for recording. This example was written with a quasi live
podcast scenario in mind.

See `scripts/prepare_record_example.lua` for details.