Extend JS API with createNode functionality and refactor

[philippotto]

• Adds api.tracing.createNode(position, options) to the front-end API.
• Refactors skeleton handler related code
• Refactors some maybe-accessors away (see Refactor data.maybe away #7999)

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• create an annotation
• run something like this in the console: webknossos.DEV.api.tracing.createNode([1596, 1596, 1538], {center: false, activate: true, branchpoint: true})

Issues:

• no issue (was a user request)

---

(Please delete unneeded items, merge only when none are left open)

• Updated changelog
• Updated migration guide if applicable
• Updated documentation if applicable
• Adapted wk-libs python client if relevant API parts change
• Removed dev-only changes like prints and application.conf edits
• Considered common edge cases
• Needs datastore update after deployment

[MichaelBuessemeyer]

Thanks for the new API and refactoring. The code looks good to me and I was unable to come up with an suggestions :)

Testing also went well without any problems 🎉

In short: Good Stuff

[philippotto]

thank you! fyi, I added additionalCoordinates as optional parameters.

[MichaelBuessemeyer]

Commit a646bd5 looks alright

But sadly during testing I found that centerin doesn't properly work in the current version of the dev branch (deployed friday evening).

Here is what I tested as input

// Creating nodes at specific coordinates with varying options

webknossos.DEV.api.tracing.createNode([1596, 1596, 1538], {center: false, activate: true, branchpoint: true, additionalAxes: []});

webknossos.DEV.api.tracing.createNode([1596, 1596, 1538], {center: true, activate: true, branchpoint: true});

// Ignoring a ResizeObserver loop warning
console.js:13 Ignoring ResizeObserver loop completed with undelivered notifications.

// More node creations at different coordinates with specified options

webknossos.DEV.api.tracing.createNode([3184, 3514, 1024], {center: false, activate: true, branchpoint: true});

webknossos.DEV.api.tracing.createNode([3184, 3114, 1024], {center: true, activate: true, branchpoint: true});

webknossos.DEV.api.tracing.createNode([3290, 3622, 1024], {center: true, activate: true, branchpoint: true});

webknossos.DEV.api.tracing.createNode([3295, 3622, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3718, 3491, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3718, 3591, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3718, 3691, 1024], {center: false, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3718, 3720, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3778, 3720, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3778, 3620, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3778, 3420, 1024], {center: true, activate: true, branchpoint: false});

webknossos.DEV.api.tracing.createNode([3878, 3420, 1024], {center: true, activate: true, branchpoint: false});

When changing the y coordinate, the centering only worked on the y axis. When changing the x axis no centering / flycam moment happened :/

Could you please have another look at this 🙏 ?