@multion Finish amazon add book to cart plugin

[josancamon19]

If during a conversation someone recommends me a book, or I chat an specific book, I want that book to be added to my amazon account.

• MultiOn oAuth is done via plugin, so when you oAuth, the plugin stores the user API key.
• Plugin endpoint is modified, prompt improved. https://github.com/BasedHardware/Omi/blob/cf3c8f6fcc18cf6490279ac75bebad85215c122b/plugins/example/_multion/router.py#L64C2-L70C44
• Modify community-plugins.json for it to work.