chore: add nova-3 models, add deprecation warnings to legacy models

[thisislvca]

Proposed changes

Just some basic chores. I'm using this SDK in production, and I'm having to create a custom model id in order to use nova-3. Now that it's released, I think it'd be nice to add it to the SDK too.

• Added Nova 3 models ids
• added deprecation warnings to models now listed as legacy on the official docs
• updated tests with legacy models to use new models (they all still pass ;)

Types of changes

• Bugfix (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)
• Documentation update or tests (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING.md doc
• I have added tests and/or examples that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

As a side note, in CONTRIBUTING.md you guys ask that PRs are created on the dev branch, but it doesn't exist...

[ashutoshxhq]

@thisislvca waiting on this.

[thisislvca]

hey! I'm not on the deepgram team, I think @jcdyer is the core maintainer of this crate. Hopefully they can merge this soon :)

[bd-g]

Thanks for the PR! Good catch on the dev branch - this SDK is still in the process of being "officialized", so some of the edges aren't polished yet.

I like the idea of matching the model deprecation attributes to the official Deepgram documentation.

[thisislvca]

Hey @bd-g updated everything, it should now work :)

Changed the "deprecated since" to 0.6.8 as that's the next release number, but lmk if you plan to public this as 0.7.0 or smth else, will update it.