refactor(uv): Migrate to UV Workspace approach

[Suyog Shimpi (Evergreenies)]

This PR contains changes requested by #5250 .

Added support for UV workspace for the below subprojects -

 'langgraph'
 'langgraph-checkpoint'
 'langgraph-checkpoint-postgres'
 'langgraph-checkpoint-sqlite'
 'langgraph-prebuilt'
 'langgraph-sdk'
 'langgraph-cli'

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Project	Deployment	Preview	Comments	Updated (UTC)
langgraph-docs-preview	Ready	Preview	Comment	Sep 28, 2025 3:51am

[Suyog Shimpi (Evergreenies)]

Hello Sydney Runkle (@sydney-runkle)
Please review the changes and suggest me appropriate approach for sdk-py as it has different version.

[Suyog Shimpi (Evergreenies)]

Hello Sydney Runkle (@sydney-runkle) ,

Are there there any plan to sync all packages on same Python (like Python3.12) version. This will help us to manages all packages in uv workspace.

If there is any plan, feel free to assign me these migrations tasks.

[jito (jitokim)]

LGTM!
This is well-structured as a root workspace 👍

[Suyog Shimpi (Evergreenies)]

Sydney Runkle (@sydney-runkle) can you please review this PR?

[Sydney Runkle (sydney-runkle)]

Looking like a great start, thanks!

[Suyog Shimpi (Evergreenies)]

Sydney Runkle (@sydney-runkle) Looking to have review on this PR and want to know in which release it will be merged.

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Suyog Shimpi (@Evergreenies) is attempting to deploy a commit to the LangChain Team on Vercel.

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[Suyog Shimpi (Evergreenies)]

Hi Sydney Runkle (@sydney-runkle) , hope you're having a good week. I'm checking back on this PR. It's still a change I'm excited about contributing. Would it be possible for you or another team member to review it when you have a chance? I'm happy to make any changes requested. Thanks for your consideration!

[Suyog Shimpi (Evergreenies)]

Hello Mason Daugherty (@mdrxy) ,

May I know any progress around merging this PR? Or do we need to include any changes?\