Add Mustache.java template adapter

[jaguililla]

https://github.com/spullara/mustache.java

[rakshitriya]

Hey @jaguililla , can I work on this if it's still open?

[jaguililla]

Absolutely! I'll assign this task to you and set it to 'in progress'.

If you need anything, don't hesitate to reach me :)

Thank you for your contribution to the project!

[jaguililla]

Hello, the Hexagon GitHub organization has been renamed to https://github.com/hexagontk. You will need to change your local clone remotes to reflect this change. Thanks and sorry for the inconvenience.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[github-actions]

This issue was closed because it has been stalled for 7 days with no activity.