Adding realtime entry point for java

Author: jpalvarezl

.typespec/realtime/java_client.tsp

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+import "@typespec/http";
+import "@typespec/openapi3";
+import "@typespec/openapi";
+
+import "./main.tsp";
+
+/** The OpenAI REST API. Please see https://platform.openai.com/docs/api-reference for more details. */
+@service({
+    title: "OpenAI API",
+    termsOfService: "https://openai.com/policies/terms-of-use",
+    contact: {
+      name: "OpenAI Support",
+      url: "https://help.openai.com",
+    },
+    license: {
+      name: "MIT",
+      url: "https://github.com/openai/openai-openapi/blob/master/LICENSE",
+    },
+  })
+  @server("https://api.openai.com/v1", "OpenAI Endpoint")
+  @useAuth(BearerAuth)
+  namespace OpenAI;

.typespec/realtime/tspconfig.yaml

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+# https://typespec.io/docs/handbook/configuration/configuration/
+# adding entry point exclusive to realtime
+options:
+  "@azure-tools/typespec-java":
+    emitter-output-dir: "{project-root}/../TempTypeSpecFiles/java/unbranded"
+    package-dir: "azure-ai-openai-realtime"
+    namespace: "com.azure.ai.openai.realtime"
+    # partial-update: true
+    enable-sync-stack: true
+    generate-tests: false
+    generate-samples: false
+    custom-types-subpackage: "implementation.models"
+    # custom-types: "FunctionCallPreset,FileListResponse,OpenAIPageableListOfBatch"
+    # customization-class: customization/src/main/java/OpenAICustomizations.java
+    flavor: azure
+    # tsp compile .typespec/realtime/client_java.tsp --emit "@azure-tools/typespec-java"