extension: Log used renderer.

[iwannabethedev]

Log which renderer-backend was actually used in the browser console.

This is basically the same as #10903 , but without the toggle option for whether to warn or not if the actually used renderer is not the same as the preferred renderer.

Related to: #10835 , #10831 , #10900 .

CC: @n0samu @relrelb .

[relrelb]

In fact this can be implemented completely on Rust side, and with greater simplicity, using just tracing::info!() to log the chosen backend (and I think this already the case for some backends). Am I missing a reason for it to pass through TypeScript?

[n0samu]

I think we wanted to make the message appear regardless of the logLevel, like the "new Ruffle instance created" message. (My idea was to add the renderer name to that message specifically.)

[iwannabethedev]

Yes, the concept was to make it a bit more convenient to view which renderer-backend was used, such that you would not have to switch the logging level to "Info" first. I spent some time seeing if I could do it just from Rust, but I did not figure out how to do printing to the browser console apart from using tracing::info or tracing::error, and using tracing::error would probably be confusing since the printing is not an error.

The printing is in many ways inspired by the image in #10900 (comment) , which is taken from a Phaser 3 application.

Additionally, another reason is that it would allow using an HTML-popup like with window.alert though that is only relevant if the changes in #10903 are considered.

[relrelb]

Looks good, thank you!