[TIMOB-13153] added Ti javascript property to get the current script relative path to resources

[farfromrefug]

...Ressources.

I had to make a choice for the property name....
I am ok to change it if not appropriate

jira ticket

[farfromrefug]

better late than never!
I hope this one is gonna make it soon, it s a small but useful one. First step to full native js module

[sindresorhus]

👍

[pec1985]

Code reviewed and tested.

Few comments:

• The path, since it is supposed to be relative to the resources, needs to start with / and name all the folders to that file
• Parity between iOS and Android, please test Ti.include as well as require
• On Android the path is relative to the Resources while on iOS is relative to the file that required/included it.
• On Android, if using require the file name is included in the path while in iOS only the folder names

Please address the comments and we'll move forward.

[pec1985]

Closing ticket, follow this PR #5650