Python: Introducing support for declarative yaml spec (#2002)

* first work on declarative

* initial version of the declarative support

* fix tests and mypy

* fix parameters of functiontool

* slight logic improvement

* remove path until merge

* updates from comments

* create dispatcher and spec type, json_schema method

* fix mypy, skipping model

* updated lock

* fixed declarative tests and renamed some other test files

* refined loader

* updated lock

* fix mypy

* added readme to samples folder

* fixes from review

* undid test file rename

agent-samples/chatclient/Assistant.yaml

@@ -0,0 +1,18 @@
+kind: Prompt
+name: Assistant
+description: Helpful assistant
+instructions: You are a helpful assistant. You answer questions is the language specified by the user. You return your answers in a JSON format.
+model:
+    options:
+        temperature: 0.9
+        topP: 0.95
+outputSchema:
+    properties:
+        language:
+            kind: string
+            required: true
+            description: The language of the answer.
+        answer:
+            kind: string
+            required: true
+            description: The answer text.

agent-samples/chatclient/GetWeather.yaml

@@ -0,0 +1,27 @@
+kind: Prompt
+name: Assistant
+description: Helpful assistant
+instructions: You are a helpful assistant. You answer questions using the tools provided.
+model:
+    options:
+        allowMultipleToolCalls: true
+        chatToolMode: auto
+tools:
+  - kind: function
+    name: GetWeather
+    description: Get the weather for a given location.
+    bindings:
+      get_weather: get_weather
+    parameters:
+      properties:
+        location:
+          kind: string
+          description: The city and state, e.g. San Francisco, CA
+          required: true
+        unit:
+          kind: string
+          description: The unit of temperature. Possible values are 'celsius' and 'fahrenheit'.
+          required: false
+          enum:
+            - celsius
+            - fahrenheit