Add dev container for AutoGen Studio (#1241)

* Create studio subfolder in devcontainer

* Update to follow readme instructions

.devcontainer/studio/Dockerfile

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+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See LICENSE file in the project root for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM mcr.microsoft.com/vscode/devcontainers/python:3.10
+
+#
+# Update the OS and maybe install packages
+#
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+   && apt-get upgrade -y  \
+   && apt-get -y install --no-install-recommends build-essential npm \
+   && apt-get autoremove -y \
+   && apt-get clean -y \
+   && rm -rf /var/lib/apt/lists/*
+ENV DEBIAN_FRONTEND=dialog
+
+# For docs
+RUN npm install --global yarn
+RUN pip install pydoc-markdown

.devcontainer/studio/devcontainer.json

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+{
+    "customizations":  {
+        "vscode": {
+            "extensions": [
+                "ms-python.python",
+                "ms-toolsai.jupyter",
+                "visualstudioexptteam.vscodeintellicode"
+            ],
+            "settings": {
+                "terminal.integrated.profiles.linux": {
+                    "bash": {
+                        "path": "/bin/bash"
+                    }
+                },
+                "terminal.integrated.defaultProfile.linux": "bash"
+            }
+        }
+    },
+    "dockerFile": "Dockerfile",
+    "updateContentCommand": "cd samples/apps/autogen-studio && pip install -e . && sudo npm install -g gatsby-cli && cd frontend && yarn install && yarn build"
+}