Add popular PHP templating languages to code editor

[jhit]

Smarty and Twig are two very popular PHP templating engines and might be useful to some Bookstack users too.

[ssddanbrown]

Thanks for offering this @jhit. Just to confirm, do you personally have a current desire/need to use both of these code formats within BookStack?

[jhit]

@ssddanbrown Hi.,
Yes, we develop e-commerce solutions based on JTL-Shop and Shopware.
We recently started to use BookStack for internal documentation and as developers a significant part of this contains code samples with both of this templating engines.
At least Twig, as part of the Symfony framework should have a large user base today.

[ssddanbrown]

Thanks @jhit for confirming. Just a bit too late for the next feature release, since I've wrapped that up to go out tomorrow, but I've assigned this to be in the next patch release thereafter.

[jhit]

No problem @ssddanbrown. I can add the change manually for the next release. In the end, it is not a huge effort :-)
Thanks for accepting the PR