Add BatchScheduler data plane preview

specification/batch/data-plane/Azure.BatchScheduler/preview/2024-12-01.1.0/client.tsp

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+import "@azure-tools/typespec-client-generator-core";
+import "./main.tsp";
+
+using Azure.ClientGenerator.Core;
+
+namespace Client;
+// @client({
+//   name: "BatchSchedulerClient",
+//   service: Azure.BatchScheduler,
+// })

specification/batch/data-plane/Azure.BatchScheduler/preview/2024-12-01.1.0/main.tsp

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+import "@typespec/http";
+import "@typespec/rest";
+import "@typespec/versioning";
+import "@azure-tools/typespec-azure-core";
+import "@azure-tools/typespec-autorest";
+import "./routes.tsp";
+
+using TypeSpec.Http;
+using TypeSpec.Rest;
+using Azure.Core;
+using TypeSpec.Versioning;
+
+@useAuth(
+  OAuth2Auth<[
+    {
+      @doc("implicit flow")
+      type: OAuth2FlowType.implicit,
+
+      @doc("the authorization URL")
+      authorizationUrl: "https://login.microsoftonline.com/common/oauth2/authorize",
+
+      @doc("list of scopes for the credential")
+      scopes: ["https://batch.microsoft.com/.default"],
+    }
+  ]>
+)
+@versioned(Azure.BatchScheduler.Versions)
+@service({
+  title: "The Batch Scheduler Service",
+})
+@server(
+  "{batchUrl}",
+  "A client for issuing REST requests to the Azure Batch Scheduler service.",
+  {
+    @doc("The endpoint hosting the requested resource. For example, https://{account}.{region}.batchscheduler.microsoft.com/jobs/{jobId}")
+    batchUrl: string,
+  }
+)
+@doc("The batch service vNext scheduler service.")
+namespace Azure.BatchScheduler;
+@doc("The batch scheduler version.")
+enum Versions {
+  @doc("Version 2024-12-01-preview")
+  @useDependency(Azure.Core.Versions.v1_0_Preview_2)
+  v2024_12_01_Preview: "2024-12-01-preview",
+}