Replace Contextual Links BackboneJS usage with VanillaJS equivalent

Fixed some of indentation error. Keeping it Needs work to fix PHPStan error

Re-roll patch #36 and Try to fix Cs issue

fix command failures #37

Try To Fix the #38 Patch.

@Prem Suthar, Interdiff is missing in #39, We should add that along with the patch. Its help to the reviewers to find the difference and what are the changes we have made from last patch. Also some Tests fails because some of the files are missing in the patch. Please compare with #26.

Re-roll patch created for 11.x, We have added some missing JS files according to #26 and removed es6.js files with reference of this document → . Keeps as is "Needs work" because we have some unaddressed comments above.

📌 [meta] Deprecate Toolabr module Active will be unblocked soon, which will leave this as the last remaining usage of backbone in Drupal core. It would be great to be able to remove the backbone library from Drupal 12. Bumping this to major.

Rebased the MR off 11.x

Fixed the pipeline so it would run but appears to have broken a few tests.

Fixed the bad reroll which could have been me but also could have been a previous iteration.
Seems to be working locally in manual testing.

Failing tests look valid

There were some underscore references left behind. Got rid of those because they're not needed in 2025 - we have native methods

Spot checked some tests locally and its looking good

There is a functional JS failure that looks relevant, I can't rerun it since a core committer created the branch.

Yep it's a real fail
Closing the contextual link list used to place focus on the trigger but that isn't happening now.
Tried a few things but they all end up in a loop
Will revisit this week