[CAL-4343] Add variable highlight and auto-complete everywhere (workflows)

[CarinaWolli]

This is already implemented for the email body of a workflow action see here:

The text field for editing an SMS/Whatsapp workflow action and the text field for email subject don't use our Editor component. We don't want to allow editing the text but we want to have the highlight and auto-complete for variables

_{From SyncLinear.com | CAL-4343}

[krakenftw]

Hey @CarinaWolli i am up to work on it. How is this going to work when the TextArea isnt editable.
Also we have Editor and for SMS/Whatsapp its a simple TextArea what if we make it Editor for all but without the markdown for SMS/Whastapp.

[CarinaWolli]

Hey @CarinaWolli i am up to work on it. How is this going to work when the TextArea isnt editable.

Nothing should be editable, sam as it is now for email bodies on read-only workflows.

Also we have Editor and for SMS/Whatsapp its a simple TextArea what if we make it Editor for all but without the markdown for SMS/Whastapp.

Using the Editor component while disabling all formatting elements is probably the way to go. In the end, it should still look like the current TextArea but with variable auto-complete and highlighting