Add jMonkeyEngine template

[Ben-ADFA]

Ref. 3593

Issue Checklist

• I confirm that this feature request has not been previously suggested.
• I agree to follow the project's code of conduct.
• I have checked and verified that I am using the latest version of Code on the Go from GitHub or App Dev for All.

Additional terms

• I understand that feature requests are subject to evaluation and may not be implemented immediately.
• I agree to provide additional details if needed for a clearer understanding of the requested feature.

Feature description

From . on Telegram:
https://t.me/CodeOnTheGoDiscussions/3610
"The next version of Code on the Go could include empty JMONKEYENGINE and Libgdx templates, attracting a larger audience." [separate issue created for libGDX at https://github.com//issues/1153]

Link to product:
https://jmonkeyengine.org/

Use Case

Creating gaming apps

Benefits

Provides basis for creating gaming apps