Enable virtual time for generative agents

[ifsheldon]

This should close https://github.com/hwchase17/langchain/issues/4165 and it should not cause any backward incompatibility issues.

[ifsheldon]

@vowelparrot Here is the output exported as a PDF of the notebook. Nothing breaks. characters.pdf

[ifsheldon]

Any advice on fixing the lint failure? There is some type mismatch because I saved a datetime to the outputs dict of GenerativeAgentMemory.save_context, which has the type annotated as Dict[str, str].

[vowelparrot]

Any advice on fixing the lint failure? There is some type mismatch because I saved a datetime to the outputs dict of GenerativeAgentMemory.save_context, which has the type annotated as Dict[str, str].

You can update the dict typing to Dict[str, Any] in this case