Eleventy: Add support for the Eta template engine

[nebrelbug]

Hi! I'm the maintainer of Eta, an embedded JavaScript template engine.

I'd love to add Eta support to Eleventy. Eta improves on EJS in multiple areas (it has significantly better performance, for example) and also adds new features like plugins and custom delimiters.

What would the process of adding support look like? Can I submit a PR?

Is your feature request related to a problem? Please describe.
Eleventy does not support the Eta template engine.

Describe the solution you'd like
Add support for the Eta template engine

Additional context
Eta GitHub
Eta Website

[zachleat]

Love it! Stay tuned for #117 and you can easily add a plugin yourself!

[zachleat]

This repository is now using lodash style issue management for enhancements. This means enhancement issues will now be closed instead of leaving them open.

View the enhancement backlog here. Don’t forget to upvote the top comment with 👍!

[Ryuno-Ki]

@nebrelbug This might allow you to test the waters: https://github.com/11ty/eleventy/issues/1422#issuecomment-696154131