Communication template AI assistance

We've integrated support for using LLMs to assist with the creation of communication templates. You can:

• Enter a prompt for the templating language expression you want to generate (eg. "the event start date, formatted as 1st Jan 2025", or "customer name, formatted Mr John Doe"), and if supported, you'll be provided the expression to insert into a template.
• Provide an outline of the communication you wish to create (eg. "thank customer for payment, ask them to leave a review if satsified"), and have the LLM create a first draft for you.