Add support for Pydantic States in ToolNode invocation

[abprime]

Currently ToolNode only supports dict and list inputs(state).
This PR #1608 adds support for pydantic v1 based states also.

Please take a look and suggest any changes.

[abprime]

@hinthornw
Could you please take a look at the PR and suggest any changes that would be needed?

[hinthornw]

Will TAL later today !

[nfcampos]

Hi, this has been added.