Support llm embedding prefix and suffix

[saksham-jain177]

Adds support for optional embedding prefix and suffix provided by llm, applies these values when present while preserving existing behavior for older llm versions

fixes #1

[sukhbinder]

@saksham-jain177 Thanks for this. Looks good, can you please add a test for this and also update the readme.md with an example to use this.

[saksham-jain177]

Thanks for reviewing and for the feedback
Sure, I’ll add a test for the prefix support and update the README with an example showing how it’s used

[saksham-jain177]

Hey, could you please review the latest changes when you get a chance.
I’ve added an integration test covering prefix support and updated the README with a Python usage example.

[sukhbinder]

Thanks looks good!