Python: added ChatClientBase with function calling (#147)

* added ChatClientBase with function calling

* streaming update

* fixed typing

* test setup

* small update

* src setup

* removed src, updated test naming

* fixed test command

* alolow args

* updated test run

* added unit test folder to azure

* added init and unit test to azure

* added other cross tests

* restructured

* reset test run

* fix name

* removed always

* updated test

* extend pytest.xml locations

* run surface always

* added decorators for FC and marked tests

* fixed mypy settings and added tests

* fix override import

* removed import

python/packages/main/.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"
+        }
+    ]
+}