Add back AI POC support as it was in GUI1

[AdRiley]

• This is a first step in restoring AI functionality.
• Internal feature only.
• Enabled by adding environment variable with OpenAI key.

Activated by typing AI the component browser followed by the AI prompt.
On pressing enter the CB stays open and the code is replaced with the response from the AI model.

[farmaazon]

There are some details to be settled.

First, the AI POC I remember from GUI1 worked only for tables, so to work, the user needed to select a table node first. In GUI2, that would propagate input with operatorXXXX. (As #9210 is not planned yet). So I guess typing AI and prompt will leave input like operator1234.AI give me top 5 sales of every month, please. Are we ok with that?

[AdRiley]

• Yes OK if it only works for tables for this story.
• Yes OK for the activating command to be operator1234.AI give me top 5 sales of every month, please

[enso-bot]

Adam Obuchowicz reports a new STANDUP for today (2024-03-18):

Progress: Ported the code from old GUI, so far in a bit dirty manner. It should be finished by 2024-03-29.

Next Day: Next day I will be working on the same task. fix all issues, and clean up code. Then add some features like "pending query" message.

[enso-bot]

Adam Obuchowicz reports a new STANDUP for yesterday (2024-03-21):

Progress: Add tests and fixed all issues in GUI, but found some strange behavior in engine's extension methods. It should be finished by 2024-03-29.

Next Day: Next day I will be working on the same task. Apply a workaround for engine's issue and create a PR.