Add chat capability to widget

[DavidIsaacBPS]

Add an interactive form to allow it to connect to a chat server.

Additional Information
This would be helpful for websites like Grants.gov that already have a chat widget, to avoid having two widgets on the same page.

Alternatives

• Use wrapper to open either chat or feedback widget
• Add chat tab to widget

Solution Concept
Implement a new "chat" field type using a custom LIT element that connects to a chat service in Amazon Bedrock via the Bridge using WebSocket protocol to provide a streaming response.

Acceptance Criteria

• User can enter plain text and receive a response
• Implementation is less than 100 SLOC.
• Two users can have different chats at the same time
• If the installation ID does not match that for BPS, the query is not sent to the chat server and the string "The configured installation is not authorized for chat."

[DavidIsaacBPS]

Need to determine the feasibility, complexity, and performance impact of merging all chat widget functionality into the feedback widget.

[alkmei]

Closed with #202