Add Devcontainers to allow easy use of the AF repo from github codespaces (#1224)

* Add dev containers

* Add workspace folder and cs dev extension

* Try other workspace folder format

* Add default solution.

* Move default solution to settings.json

* Fix repo open

* Remove duplicate python codespace and rename folder

* Add recommended C# extensions and a default build task

* Add vscode icons extension by default

* Add python setup and customizations, plus ai studio for all

* Add bash command

* Try running devsetup from workspace folder

* Remove echo and cd

* Change workspace mount

* Change dotnet workspace name

* Revert workspacemount addition

* Try workspace mount to root

* remove trailing slash

* Try workspacefolder with var

* Revert to original approach

* Modify dev containers to work in main repo.

* Remove trailing comma

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.devcontainer/devcontainer.json

@@ -0,0 +1,18 @@
+{
+  "name": "Python 3",
+  "image": "mcr.microsoft.com/devcontainers/python:3.13-bullseye",
+  "features": {
+    "ghcr.io/va-h/devcontainers-features/uv:1": {}
+  },
+  "postCreateCommand": "bash ./devsetup.sh",
+  "workspaceFolder": "/workspaces/agent-framework/python/",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "ms-windows-ai-studio.windows-ai-studio",
+        "littlefoxteam.vscode-python-test-adapter"
+      ]
+    }
+  }
+}