Add Snowflake Cortex Integration

[q-maze]

Description

Add integration with Snowflake Cortex LLMs.

New Package?

Did I fill in the tool.llamahub section in the pyproject.toml and provide a detailed README.md for my new integration or package?

• Yes
• No

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran make format; make lint to appease the lint gods

[logan-markewich]

This looks pretty good, but one minor nit

[q-maze]

Added missing aiohttp as a dependency

[q-maze]

Not sure why cryptography isn't in the environment? Its in my local env. I'll look into it more tomorrow.

[q-maze]

Added missing aiohttp as a dependency

Not sure why cryptography isn't in the environment. Its in my local env. I'll look into it more tomorrow.

Don't do a lot of poetry, but aiohttp is a dependency of llama-index-core, so not sure why I had to add that? I went ahead and added cryptography to the dependencies, but it will only work for certain versions of Python 3.9.