Can someone merge my pull request?

[IsusRamzy]

I made a pull request (#2673).
It will include HTML templates engine built-in for Echo.
The current way to make a template is not user-friendly and takes lots of lines.
I'm a beginner here, but I have some knowledge in Flask.
In Flask, render_template is builtin, I can import it and use it without many lines.

[IsusRamzy]

?

[martinyonatann]

your PR have some comment from maintainer