challenge(formatter): Attach comments to labels

[Conaclos]

Summary

This partially fixes js/comments/break-continue-statements.js.

Prettier has a dedicated syntax node for labels. This allows attaching comments to the label. Biome has n osuch node and thus moves comments at the end of the statement.

To fix the difference, I introduced a new CST node JsLabel.
The node have to be introduced for JsBreakStatement and JsContinueSTatement. For uniformity, I also used JsLabel for JsLabeledSatteement. Alternatively, we could still directly use a token for JsLabeledSatteement or differentiate JsLabel into JsLabelReference and JsLabelBinding. Any opinion?

For now, leading comments are correctly attached to the label.
I encounter an issue with trailing comments: when I changed the code to attach them to the label I got a reformat instability.

Test Plan

Updated.

[github-actions]

Parser conformance results on

js/262

Test result	main count	This PR count	Difference
Total	49701	49701	0
Passed	48721	48721	0
Failed	980	980	0
Panics	0	0	0
Coverage	98.03%	98.03%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6322	6322	0
Passed	2036	2036	0
Failed	4286	4286	0
Panics	0	0	0
Coverage	32.20%	32.20%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	662	662	0
Passed	592	592	0
Failed	70	70	0
Panics	0	0	0
Coverage	89.43%	89.43%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	17646	17646	0
Passed	13454	13454	0
Failed	4190	4190	0
Panics	2	2	0
Coverage	76.24%	76.24%	0.00%

[ematipico]

It's a bit unfortunate that we need to add a new node. But I suppose it's fine!