feat: add additional allowed imports

[beaugunderson]

based on Denis' request here:

#332 (comment)

[beaugunderson]

@djantzen any concerns with adding these?

[djantzen]

@djantzen any concerns with adding these?

Not from a security perspective, although I'm far from expert in those libraries. At some point we may need to care about memory usage when importing libraries into plugins.

[beaugunderson]

@djantzen any concerns with adding these?

Not from a security perspective, although I'm far from expert in those libraries. At some point we may need to care about memory usage when importing libraries into plugins.

agreed... only pydantic is a third-party library, the others are stdlib

and pydantic is already imported in many places in the SDK, which then gets included in the plugin runner, so this specific addition will not have memory impact, but I agree that yes, we should always do the work to understand memory impact of any imported modules regardless of who is writing the code