Make plugin description more concise

[jsmorabito]

Current:

New description with update for concision and replacing Claude and Gemini with Anthropic and Google as they are the providers:
"Access LLMs via remote providers (OpenAI, Anthropic, Google) and locally with GPT4All."

[eharris128]

Example PR - https://github.com/obsidianmd/obsidian-releases/pull/6643/files