[none] Testing 123

[svgeesus]

Sacrificial dummy issue filed on the fxtf repo to test migrating issues over to CSSWG as required by

• [all] Fold the FXTF specs back into CSSWG? fxtf-drafts#509

Here is a dummy spec link https://drafts.fxtf.org/compositing-1/#canvascompositingandblending and a reference to a csswh issue

• Clarify order of operations between transformed root backgrounds and filters #9416

and an fxtf issue

w3c/fxtf-drafts#541

I'm also adding labels, some of which also exist in csswg repo, and some of which do not.

[svgeesus]

So Commenter Response Pending came across okay but compositing-1 did not as it does not exist here.

So all the spec-identifying labels from fxtf need to be created here first, before issues are transferred.