Add support for adding more variables in a custom template

[deshraj]

🚀 The feature

Currently, embedchain only allows variables such as context, history, and query for .chat() and .query(). Ideally, we want to allow users to add any variable to the template and then pass it during the query/chat method call.

Motivation, pitch

Users should be able to add more variables to the template for their use cases.

[zacreid]

Hey @deshraj,

My first time contributing! but would this be something that could help with this? https://github.com/embedchain/embedchain/pull/567

[mohebmithani]

Hey @deshraj @taranjeet can I take this?

[deshraj]

Yes, please feel free to take it.