Python: [BREAKING] Main to core (#983)

* removed pydantic from types

* fix assistants client

* Remove Pydantic usage from workflow code.

* updated lock and test fixes

* moved main to core, and setup meta package

* updated versions

* updated lock

* fixed agents dependency

* added retry to merge tests

---------

Co-authored-by: Evan Mattson <evan.mattson@microsoft.com>

python/packages/core/.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python Debugger: Current File",
+            "type": "debugpy",
+            "request": "launch",
+            "program": "${file}",
+            "console": "integratedTerminal"
+        }
+    ]
+}