fix: update LMStudio API Endpoint and added model name support

[kimmywork]

Why are these changes needed?

LMStudio API requires a version (v1) and model name to invoke.

Related issue number

N/A

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

[kimmywork]

@microsoft-github-policy-service agree

[kimmywork]

@LittleLittleCloud
I am trying to run full dotnet test locally but failed with several cases in AutoGen.DotnetInteractive.Tests.
All caused by following exception:

System.ArgumentException : System.ArgumentException: KernelSpec python3 not found

Are there any pre-configuration steps I missed to run the test?

[LittleLittleCloud]

@kimmywork The error indicates that jupyter kernel is missing in your python env. You would need to configure jupyter kernel

python -m pip install --upgrade pip
python -m pip install jupyter
python -m pip install ipykernel

After that , invoking python -m jupyter kernelspec list to make sure python3 is present there