[z1981] Add new SCRIPT_COMMAND_SEND_TAXI_PATH to trigger a taxi path

Idea for this patch by Klark20 (maybe he also was the author of this patch as well, I cannot check in this moment)

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit 11d92a9)

Signed-off-by: Nighoo <nighoo@gmail.com>

(cleaned version of 0b3ab88)

(based on commit [s1573] - 7721584)