Function spec examples for camera and image query

[danielp370]

This PR provides an example functions for:

1. generate a camera snapshot image.
2. use the query image service call to analyze the image and return a text description
3. A combined function that does 1 and 2 above.

All three functions tested.

The integration works well with 1 and 2 defined, and the LLM figures out how to combined them, so option 3 is only for those that want really want to combined them.

I recommend keeping filename exposed so that the LLM can manage it, and potentially delete it or overwrite it.

[jekalmin]

Thanks for your contribution!
It will be released in the next version.