Add datavirtualization extension (#21594)

* initial

* cleanup

* Add typings ref

* fix compile

* remove unused

* add missing

* another unused

* Use newer vscodetestcover

* newer dataprotocol

* format

* cleanup ignores

* fix out path

* fix entry point

* more cleanup

* Move into src folder

* Handle service client log messages

* remove unused

extensions/datavirtualization/src/typings/globals/istanbul/index.d.ts

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+// Generated by typings
+// Source: https://raw.githubusercontent.com/DefinitelyTyped/DefinitelyTyped/56295f5058cac7ae458540423c50ac2dcf9fc711/istanbul/istanbul.d.ts
+declare module 'istanbul' {
+  namespace istanbul {
+    interface Istanbul {
+      new (options?: any): Istanbul;
+      Collector: Collector;
+      config: Config;
+      ContentWriter: ContentWriter;
+      FileWriter: FileWriter;
+      hook: Hook;
+      Instrumenter: Instrumenter;
+      Report: Report;
+      Reporter: Reporter;
+      Store: Store;
+      utils: ObjectUtils;
+      VERSION: string;
+      Writer: Writer;
+    }
+
+    interface Collector {
+      new (options?: any): Collector;
+      add(coverage: any, testName?: string): void;
+    }
+
+    interface Config {
+    }
+
+    interface ContentWriter {
+    }
+
+    interface FileWriter {
+    }
+
+    interface Hook {
+      hookRequire(matcher: any, transformer: any, options: any): void;
+      unhookRequire(): void;
+    }
+
+    interface Instrumenter {
+      new (options?: any): Instrumenter;
+      instrumentSync(code: string, filename: string): string;
+    }
+
+    interface Report {
+    }
+
+    interface Configuration {
+      new (obj: any, overrides: any): Configuration;
+    }
+
+    interface Reporter {
+      new (cfg?: Configuration, dir?: string): Reporter;
+      add(fmt: string): void;
+      addAll(fmts: Array<string>): void;
+      write(collector: Collector, sync: boolean, callback: Function): void;
+    }
+
+    interface Store {
+    }
+
+    interface ObjectUtils {
+    }
+
+    interface Writer {
+    }
+  }
+
+  var istanbul: istanbul.Istanbul;
+
+  export = istanbul;
+}

extensions/datavirtualization/src/typings/globals/istanbul/typings.json

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+{
+	"resolution": "main",
+	"tree": {
+		"src": "https://raw.githubusercontent.com/DefinitelyTyped/DefinitelyTyped/56295f5058cac7ae458540423c50ac2dcf9fc711/istanbul/istanbul.d.ts",
+		"raw": "registry:dt/istanbul#0.4.0+20160316155526",
+		"typings": "https://raw.githubusercontent.com/DefinitelyTyped/DefinitelyTyped/56295f5058cac7ae458540423c50ac2dcf9fc711/istanbul/istanbul.d.ts"
+	}
+}

extensions/datavirtualization/src/typings/markdown-it-named-headers.d.ts

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+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+declare module 'markdown-it-named-headers' { }

extensions/datavirtualization/src/typings/mssqlapis.d.ts

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+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+// This is the place for extensions to expose APIs.
+
+import * as azdata from 'azdata';
+import * as vscode from 'vscode';
+
+/**
+* The APIs provided by Mssql extension
+*
+* @export
+* @interface MssqlExtensionApi
+*/
+export interface MssqlExtensionApi {
+	/**
+	 * Gets the object explorer API that supports querying over the connections supported by this extension
+	 *
+	 * @returns {IMssqlObjectExplorerBrowser}
+	 * @memberof IMssqlExtensionApi
+	 */
+	getMssqlObjectExplorerBrowser(): MssqlObjectExplorerBrowser;
+}
+
+/**
+ * A browser supporting actions over the object explorer connections provided by this extension.
+ * Currently this is the
+ *
+ * @export
+ * @interface MssqlObjectExplorerBrowser
+ */
+export interface MssqlObjectExplorerBrowser {
+	/**
+	 * Gets the matching node given a context object, e.g. one from a right-click on a node in Object Explorer
+	 *
+	 * @param {azdata.ObjectExplorerContext} objectExplorerContext
+	 * @returns {Promise<T>}
+	 */
+	getNode<T extends ITreeNode>(objectExplorerContext: azdata.ObjectExplorerContext): Promise<T>;
+}
+
+/**
+ * A tree node in the object explorer tree
+ *
+ * @export
+ * @interface ITreeNode
+ */
+export interface ITreeNode {
+	getNodeInfo(): azdata.NodeInfo;
+	getChildren(refreshChildren: boolean): ITreeNode[] | Promise<ITreeNode[]>;
+}
+
+/**
+ * A HDFS file node. This is a leaf node in the object explorer tree, and its contents
+ * can be queried
+ *
+ * @export
+ * @interface IFileNode
+ * @extends {ITreeNode}
+ */
+export interface IFileNode extends ITreeNode {
+	getFileContentsAsString(maxBytes?: number): Promise<string>;
+}

extensions/datavirtualization/src/typings/ref.d.ts

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+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+/// <reference path='../../../../src/vscode-dts/vscode.d.ts'/>
+/// <reference path='../../../../src/sql/azdata.d.ts'/>
+/// <reference path='../../../../src/sql/azdata.proposed.d.ts'/>
+/// <reference types='@types/node'/>