tools: add traprain-send-turn-by-turn

A new command line tool to send turn-by-turn notifications.

Apertis: https://phabricator.apertis.org/T2815



Signed-off-by: Guillaume Desmottes <guillaume.desmottes@collabora.co.uk>
Reviewed-by: Justin Kim <justin.kim@collabora.com>
Differential Revision: https://phabricator.apertis.org/D5379