'Move to new file' refactoring for JavaScript and TypeScript

[mjbvz]

Add a new refactoring that extracts a class or function to a new file next to the current one. For example, for the simple project:

code.ts:

export class Foo { }
export class Bar { }

If the user highlightsBar, the extract to new file action would result in:

code.ts:

export class Foo { }

bar.ts:

export class Bar { }

[mohsen1]

Awesome! Love to see this happen in the next release!

Per my example in #50474 extracted class/function should be exported from the new file and get imported into the original file.

[kakty3]

Why it is not working for .jsx files?

[osya]

@kakty3 , Confirm that Move to a new file refactoring not working for .jsx files. In opposite to PyCharm where it just works

[thomasjm]

Likewise for .tsx files, I press the button and nothing happens.