New: Added support for the cmi5 specification (Resolves #124)

[kaveritekawade]

Resolves #124

New

Addition of cmi5 specification support to enable Adapt courses to meet the MUST requirements outlined in the official cmi5 specification documentation for an AU.

• Update to the properties schema to include a cmi5 option under the _specification configuration, along with relevant help text updates.
• Post-build actions include the deletion of tincan.xml and the creation/editing of a valid cmi5.xml file.
• A course can be published as a valid cmi5 package, which can be uploaded to a cmi5 conformant LMS.

When the course is launched from the LMS, the course will now:

• Read the launch parameters in the URL
• Fetch an authentication token for the session
• Setup the configuration for the xapiWrapper library (used to communicate to the LRS)
• Retrieve the user's learning preferences stored on the LRS
• Send a valid cmi5 defined xAPI statements.

Testing

1. Build an adapt course with the adapt-contrib-xapi extension enabled and _specification set to cmi5 .
2. Publish a valid cmi5 package, which can be uploaded to a cmi5 conformant LMS.
3. When the course is launched from the LMS, the course will send valid cmi5 defined xAPI statements.

[kaveritekawade]

The changes have been implemented in accordance with the feedback provided on the pull request.