configure prism to use the glimmer parser, as ember doesn't use handlebars

[NullVoxPopuli]

Initially mentioned and explained here: ember-learn/guides-source#1930 (review)

Glimmer plugin for prism: https://prismjs-glimmer.nullvoxpopuli.com/
Docs: https://github.com/NullVoxPopuli/prismjs-glimmer

By using handlebars, we incorrect highlight glimmer code.
(Ember does not use handlebars, despite the extension being shared)

Here is how to set up prism with using glimmer for the hbs extension: https://github.com/shipshapecode/ember-prism/blob/main/addon/index.js#L2

---

Why didn't i get glimmer set up as a default in prismjs?

• the author of prismjs supports ie10 and earlier, which i do not
• as with highlightjs, we aren't the only users of the hbs extension. There are people using actual handlebars wich may be mislead by the glimmer parser

[mansona]

@NullVoxPopuli we are already using ember-prism here 🤔 it could be that we're on an older version since it was added 🤷 if you want to try to update and make sure that this repo works and all the repos that are using it also work then that would be a good contribution 👍

[NullVoxPopuli]

PR: #51