[feature] AI Copilot for workflows

As a Citizen Developer

I want to use AI Copilot

So that I can, with its help, create new workflows more easily or update existing ones with new ones, explained in natural language, or ask for help when issues arise.

Acceptance Criteria
TODO

Definition of Done
TODO

- [x] Support for Documentation Q&A - RAG
- Index platform-based documentation and additional README.md files of components
- Do not index standard component documentation, as it is already provided through tools
- [x] Support for answering context related questions(for example when a node is clieked it should be aware if it if questions are related to that node)
- [x] Support for editing existing workflows
- [x] Support for Chat/Build mode(when in Chat mode don't register tools that modify workflow)
- [x] Support for fixing errors in workflows
- [x] Provide two test prompts for creating sample workflows, one with already defined connection and one without(want to test how Copilot behaves with existing connection vs without)
- [x] add nullCheckAdvisor for anthropic