[Docs] Document a few specific pain-points in an FAQ or troubleshooting page

[cebtenzzre]

Some points about GPT4All that can confuse users (e.g. https://github.com/nomic-ai/gpt4all/discussions/2349, https://github.com/nomic-ai/gpt4all/issues/2367):

• The GPT4All model will not access the internet on your behalf.
• The GPT4All model cannot see the files on your computer directly. It can only see relevant snippets of files you add to a LocalDocs collection.
• GPT4All does not support integrated GPUs or APUs (i.e. laptop GPUs, excluding NVIDIA) or dedicated Intel GPUs.

[cosmic-snow]

Some things were in the old documentation:

• LocalDocs can/cannot ...
• I guess the old FAQ had some additional info, but it definitely needed an overhaul.

Other than that:

• I'm not sure 'will not access the internet on your behalf' has been mentioned before in the docs, but it would certainly be a good addition.
• Last point recently came up in this discussion, as well.