Add dev container for AutoGen Studio

[gagb]

Solution:
Create a subdirectory called .devcontainer/studio with correct Dockerfile and devcontainer.json.
I reused the Dockerfile from .devcontainer and modified the devcontainer.json to follow instructions from AutoGen Studios README.

I tested this container with GitHub Codespaces.

Why are these changes needed?

We need to add a dev container for AutoGen Studio

Related issue number

#1224

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.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bde2fc9) 32.10% compared to head (775226a) 32.10%.

Additional details and impacted files

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##             main    #1241   +/-   ##
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  Coverage   32.10%   32.10%           
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  Files          32       32           
  Lines        4392     4392           
  Branches     1024     1024           
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  Hits         1410     1410           
  Misses       2866     2866           
  Partials      116      116           

Flag	Coverage Δ
unittests	32.05% <ø> (ø)

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[gagb]

@victordibia I need your help to add a relevant reviewer to this PR.

[sonichi]

How do we use it? If I open a GitHub codespace I don't get to choose which Dockerfile to use, do I?

[gagb]

How do we use it? If I open a GitHub codespace I don't get to choose which Dockerfile to use, do I?

Use the "new with options"

[victordibia]

Thanks! I confirm I tested this and it works correctly.
I was able to launch a dev container on GH codespaces and autogenstudio was available on the terminal.

[sonichi]

How do we use it? If I open a GitHub codespace I don't get to choose which Dockerfile to use, do I?

Use the "new with options"

Thanks. Could you add this info to documentation?

[qingyun-wu]

LGTM except that documentation is missing. I am fine merging this PR. We could add documentation in a separate PR.

[gagb]

LGTM except that documentation is missing. I am fine merging this PR. We could add documentation in a separate PR.

Ty, working on that issue