Allow building pages with AI using attachments

Overview

As a content creator, I want to create content in the tool of choice and then easily migrate that to Experience Builder. We should first focus on documents that are used for a single page, e.g. .pdf , .doc,.docx, .md, an .txt. In future we should expand to being able to create multiple pages by uploading files that may contain multiple entries, such as .csv.

Proposed resolution

We should start by researching which of these file types can be processed by common LLMs such as OpenAI and Anthropic.

User interface changes