Add migration service calls to migration wizard (#12090)

* Hook up migration apis WIP

* WIP 2

* WIP 3

* Fix build breaks

* Break 2

* WIP 4

* SKU recommendation page work

* WIP 5

* A few minor fixes

* Merge main

* Add back assessment dialog

* Address feedback

Co-authored-by: Amir Omidi <amomidi@microsoft.com>

extensions/mssql/src/sqlMigration/sqlMigrationService.ts

@@ -0,0 +1,43 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as mssql from '../mssql';
+import { AppContext } from '../appContext';
+import { SqlOpsDataClient, ISqlOpsFeature } from 'dataprotocol-client';
+import { ClientCapabilities } from 'vscode-languageclient';
+import * as constants from '../constants';
+import * as contracts from '../contracts';
+
+export class SqlMigrationService implements mssql.ISqlMigrationService {
+	public static asFeature(context: AppContext): ISqlOpsFeature {
+		return class extends SqlMigrationService {
+			constructor(client: SqlOpsDataClient) {
+				super(context, client);
+			}
+
+			fillClientCapabilities(capabilities: ClientCapabilities): void {
+			}
+
+			initialize(): void {
+			}
+		};
+	}
+
+	private constructor(context: AppContext, protected readonly client: SqlOpsDataClient) {
+		context.registerService(constants.SqlMigrationService, this);
+	}
+
+	async getAssessments(ownerUri: string): Promise<mssql.SqlMigrationAssessmentResult | undefined> {
+		let params: contracts.SqlMigrationAssessmentParams = { ownerUri: ownerUri };
+		try {
+			return this.client.sendRequest(contracts.GetSqlMigrationAssessmentItemsRequest.type, params);
+		}
+		catch (e) {
+			this.client.logFailedRequest(contracts.GetSqlMigrationAssessmentItemsRequest.type, e);
+		}
+
+		return undefined;
+	}
+}