* Pydantic V2 support
* Support Python 3.8
* Mark as classmethod
* Remove max int validation
* Run poe format
* Merge develop
* Revert dataclasses import
* Fix revert
* feat: pydantic version of google pb
* fix: patch pb Struct to support json, dict rountrip
* fix: pydantic-version google pb, json, dict rntrip
* chore: remove `@generated`, remove gen, code fmt
* chore: test case for pydantic-version google pb