Feature: customized merge nodes

Hello, I would like to contribute a piece of code that enables Lexical to support customized merge nodes. In my scenario, my users will create some references that are similar to wikis. However, when there are multiple references before and after, such as 1, 2, 3, the users would like to display them as 1-3 for a more concise look. I am not sure if this functionality enhancement will be accepted by the official team.

the place I will modify is in function $applyAllTransforms, get a registered callback array, and call it for each