[Feature]: JSON field support

[renaisser]

Is there an existing issue for this?

• [x] I have searched the existing issues

Is your feature request related to a problem? Please describe.

Add a JSON field in the collections

Describe the solution you'd like.

Hey Milvus Team!

It'd be super cool if you could add JSON field support to the library. Those fields are crazy useful for handling all sorts of data. Would love to see this in there—let me know if you need any input!

Thanks a ton for all the awesome work!

Describe an alternate solution.

No response

Anything else? (Additional Context)

No response