Side by side ASTs for same code

[ArnaudBarre]

Clear and concise description of the problem

I'm currently trying to make OXC output closer to ESTree (see these issues). I spend a lot of time going back and force between two tabs.

This would also help me when I port lint rule from an ESTree to the TS AST.

Suggested solution

A three panel mode, like code top and then left/right with two parsers

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[Triumph-light]

I don't think anyone has done this feature, so let me bring up this PR this @sxzz 。
Working at https://github.com/Triumph-light/ast-explorer-dev/tree/feature-multiple-splitpane

[ArnaudBarre]

This would be awesome @Triumph-light 🙌

[Triumph-light]

Now the basic functions are basically complete, you can see the effect @sxzz 😆