feat: Update Models List (#644)

* Updating models list + formatting

* Updating release notes

* Removing Sonar from OpenAI

Author: n-o-u-r-h-a-n

docs/release_notes.md

@@ -12,7 +12,7 @@
 
 ### ✨ New Functionality
 
--
+-[Orchestration] Added new models for `OrchestrationAiModel`: `SONAR`,`SONAR_PRO`.
 
 ### 📈 Improvements
 

orchestration/src/main/java/com/sap/ai/sdk/orchestration/OrchestrationAiModel.java

@@ -318,6 +318,12 @@ public class OrchestrationAiModel {
   public static final OrchestrationAiModel DEEPSEEK_R1 =
       new OrchestrationAiModel("deepseek-ai--deepseek-r1");
 
+  /** Perplexity AI Sonar model */
+  public static final OrchestrationAiModel SONAR = new OrchestrationAiModel("sonar");
+
+  /** Perplexity AI Sonar Pro model */
+  public static final OrchestrationAiModel SONAR_PRO = new OrchestrationAiModel("sonar-pro");
+
   OrchestrationAiModel(@Nonnull final String name) {
     this(name, Map.of(), "latest");
   }