Missing param and return types in Chroma and Qdrant vector stores

[NavyaAlapati13]

🚀 The feature

The Qdrant and Chroma vector store files are missing parameter types and return types for the functions. It's a non breaking change which will increase code clairty.

Motivation, pitch

To increase the code readabliliy and clarity, and maintain coding standards.

[NavyaAlapati13]

I will share a PR soon for this.
@Dev-Khant can you please assign me this issue?

[Dev-Khant]

Hey @NavyaAlapati13 thanks for picking this up! I'll assign it to you.