Add FIXME about process filter to refine mpv shell output

Ensure process args are not an empty list

Do not specify the process connection type

I do not see any difference in how it works.  Let's keep it to
whatever Emacs considers a good default.

Define mandoura-play-file-with-optional-subs

Make mandoura--make-process accept optional args

Remove needless 'if'

Specify :connection in mandoura--make-process; add notes

Add FIXME for process sentinel to make buffer readable

Abstract make-process to keep the code reusable

Remove needless, commented out snippet

Define mandoura-return-track-title-and-time command

Add helper functions to convert MPV times to readable format

Remove task for unavailable property

Add link to where MPV properties are described

Make process termination non-interactive

Stop using stderr buffers; direct everything to stdout

Add minibuffer history for mandoura-playlist-prompt

Add task to retrieve the artist name

Change keyword for readability

Add command and user option to play saved playlists