replace monaco-editor with TipTap editor for Prompt and Agent prompt inputs fields

[dimaMachina]

No description provided.

[sarah-inkeep]

1. I think if there are xml tags in the prompt they are getting stripped out in the new editor:

2. I'm seeing an error about the $timestamp variable being unknown (this was in the inkeep-qa-graph.

3. small nit but maybe we could only show the scroll boxes if the prompt is scrollable

4. It seems like when the prompt editor is rendered it's marking the agent as unsaved even if I haven't made any changes.

[sarah-inkeep]

also just noticed a few bugs with expand mode:

1. if I click "Add variable" in the expand mode, it adds the curly bracket but I don't see the dropdown picker.

2. If I try to add a variable after having been in the expand mode, nothing happens https://www.loom.com/share/9f48f6909df94dd28266d2943ef56140

I notice that the prompt in the fact-agent graph has backticks but I don't think they are intended to be rendered as code here since it is part of the instruction to the LLM to include backticks when providing code.

[dimaMachina]

Could we also set a maxHeight on the variables dropdown, I noticed it can sometimes overflow the page if there are a lot:

yep, I finally found how to use shadcn dropdown and set max-h-64 🙏