Updating release notes and ToC in docs

Author: rpanackal

docs/guides/OPENAI_CHAT_COMPLETION.md

@@ -3,6 +3,7 @@
 ## Table of Contents
 
 - [Introduction](#introduction)
+    - [New User Interface (v1.4.0)](#new-user-interface-v140)
 - [Prerequisites](#prerequisites)
 - [Maven Dependencies](#maven-dependencies)
 - [Usage](#usage)

docs/release-notes/release_notes.md

@@ -8,16 +8,22 @@
 
 ### 🔧 Compatibility Notes
 
-- The constructors `UserMessage(MessageContent)` and `SystemMessage(MessageContent)` are removed. Use `Message.user(String)`, `Message.user(ImageItem)`, or `Message.system(String)` instead.
+- [Orchestration] The constructors `UserMessage(MessageContent)` and `SystemMessage(MessageContent)` are removed. Use `Message.user(String)`, `Message.user(ImageItem)`, or `Message.system(String)` instead.
 - Deprecate `getCustomField(String)` in favor of `toMap()` on generated model classes.
-  - `com.sap.ai.sdk.core.model.*`
-  - `com.sap.ai.sdk.orchestration.model.*`
+    - `com.sap.ai.sdk.core.model.*`
+    - `com.sap.ai.sdk.orchestration.model.*`
 
 ### ✨ New Functionality
 
-- [Add Spring AI tool calling](../guides/SPRING_AI_INTEGRATION.md#tool-calling).
-- [Add Document Grounding Client](https://github.com/SAP/ai-sdk-java/tree/main/docs/guides/GROUNDING.md)
-  - `com.sap.ai.sdk:document-grounding:1.4.0` 
+- [Orchestration] [Add Spring AI tool calling](../guides/SPRING_AI_INTEGRATION.md#tool-calling).
+- [Document Grounding] [Add Document Grounding Client](https://github.com/SAP/ai-sdk-java/tree/main/docs/guides/GROUNDING.md)
+    - `com.sap.ai.sdk:document-grounding:1.4.0`
+- [OpenAI] New generated model classes introduced for _AzureOpenAI_ specification dated 2024-10-21.
+- [OpenAI] Introducing [new user interface](../guides/OPENAI_CHAT_COMPLETION.md/#new-user-interface-v140) for chat completion wrapping the generated model classes.
+    - `OpenAiChatCompletionRequest` and `OpenAiChatCompletionResponse`' for high level request and response handling.
+    - `OpenAiUserMessage`, `OpenAiSystemMessage`, `OpenAiAssistantMessage` and `OpenAiToolMessage` for message creation for different content types.
+    - `OpenAiToolChoice` for configuring chat completion requests with tool selection strategy.
+- [OpenAI] Introducing new user interface for embedding calls using `OpenAiEmbeddingRequest` and `OpenAiEmbeddingResponse`.
 
 ### 📈 Improvements