feat: emit event when each reorder item snaps into place

[sfinktah]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already include this feature request, without success.

Describe the Feature Request

Need to be able to modify ion-item while it is being reordered in an ion-list

Describe the Use Case

Observe the graphical example, in which the numerical ordering of each item must change as it (or other) items are reordered.

Describe Preferred Solution

Adding an extra event, analogous to mousemove, complementing the existing event (analogous to mouseup or click)

<ion-list class="">
  <ion-reorder-group 
  :disabled="false" 
  @ionItemMove="handleMove($event)" 
  @ionItemReorder="handleReorder($event)">
...

Describe Alternatives

It is possible to achieve this using MutationObservers, but it is not pleasant.

Related Code

See above

Additional Information

PR has already be lodged.

[liamdebeasi]

Thanks for the report. I am going to discuss this feature request with the team.

[sfinktah]

@liamdebeasi No probs, I put a live demo up at https://ionic-list.nt4.com/ with the source at https://nt4.com/ionic-list/

[liamdebeasi]

Thanks! I spoke with the team and we think this is a good feature to add to Ionic. Related issue for start/end events: #23148