FFExpert: link to docs and installation for mentioned nodes

[gstout52]

Description

When in the context of the immersive editor, if a user asks a question that references nodes that are not contained in the default palette, link to the node documentation and provide a link to install the node in the NR Editor.

From Steve's idea here: https://flowforgeworkspace.slack.com/archives/C09QS57R8AD/p1762456656137389

Epic/Story

No response

Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate