[🐕 Batch]: Add a list of example molecules within model repositories

[DhanshreeA]

Summary

• Related to testing built images
• Related to sampling of example inputs

Describe the solution you'd like.

We want to make the example generator use the given list of smiles if it exists and not sample inputs in that case.

Documentation.

No response

[DhanshreeA]

This is unrealistic to do for all models within Ersilia and we take this up on a case by case basis. I am closing this issue as unplanned.