Add ability to pickle a `Table`

[Fokko]

Feature Request / Improvement

This allows distribution of the Table object within Ray.

[amogh-jahagirdar]

@Fokko if nobody is already looking at this, would love to try and take a stab at this?

[Fokko]

@amogh-jahagirdar That would be great!

[kevinjqliu]

I was looking at Pydantic docs and it looks like there's a helpful function which supports pickling and unpickling

https://docs.pydantic.dev/latest/concepts/serialization/#pickledumpsmodel

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