PaLM 2 API Integration

[Mr-Destructive]

Description

Created a basic handler for PaLM API Integration into mindsdb.
It has the following set of features:

• Generate Completion with a prompt
• Generate Response with a given Prompt Template
• Generate Embeddings for a given piece of text

Fixes #7319

Type of change

(Please delete options that are not relevant)

• ⚡ New feature (non-breaking change which adds functionality)
• 📄 This change requires a documentation update

Verification Process

To ensure the changes are working as expected:

• Test Location: Specify the URL or path for testing.
• Verification Steps: Outline the steps or queries needed to validate the change. Include any data, configurations, or actions required to reproduce or see the new functionality.

Additional Media:

• I have attached a brief loom video or screenshots showcasing the new functionality or change.

Checklist:

• My code follows the style guidelines(PEP 8) of MindsDB.
• I have appropriately commented on my code, especially in complex areas.
• Necessary documentation updates are either made or tracked in issues.
• Relevant unit and integration tests are updated or added.

I want to get feedback on the proposed way of this integration. I have used references from the OpenAI handler for this to get started. I am open to any suggestions or improvements you might have. Please let me know about the required changes and improvements.

Thank you. 🙏

[dusvyat]

@Mr-Destructive Overall this looks great, thanks for your contribution.

One suggestion to make it even better would be to provide default args and create validation via a pydantic BaseModel class.

see the writer handler for an example of what I mean.

Specifically here and here

[Mr-Destructive]

Have updated the integration with the pydantic BaseModel for the default args. Let me know of further changes if required.

[dusvyat]

adding the following config class nested under your base model will prevent additional args being passed in query

class Config:
   extra = Extra.forbid

[dusvyat]

Have updated the integration with the pydantic BaseModel for the default args. Let me know of further changes if required.

@Mr-Destructive thanks for the quick changes, 2 minor comments then we are good to merge

[dusvyat]

thanks again, lgtm

[martyna-mindsdb]

Please add a README file to the PaLM integration.