Inital platform relayering (#6385)

* moving test files and inital refactoring

* relayer extension host code

* fix imports

* make insights work

* relayer dashboard

* relayer notebooks

* moveing more code around

* formatting

* accept angular as browser

* fix serializer

* add missing files

* remove declarations from extensions

* fix build errors

* more relayering

* change urls to relative to help code relayering

* remove layering to prep for merge

* fix hygiene errors

* fix hygiene errors

* fix tests

src/sql/platform/connection/test/common/testConnectionProvider.ts

@@ -0,0 +1,51 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as azdata from 'azdata';
+import { mssqlProviderName } from 'sql/platform/connection/common/constants';
+
+export class TestConnectionProvider implements azdata.ConnectionProvider {
+	public readonly providerId = mssqlProviderName;
+
+	connect(connectionUri: string, connectionInfo: azdata.ConnectionInfo): Thenable<boolean> {
+		return undefined;
+	}
+
+	disconnect(connectionUri: string): Thenable<boolean> {
+		return undefined;
+	}
+
+	cancelConnect(connectionUri: string): Thenable<boolean> {
+		return undefined;
+	}
+
+	listDatabases(connectionUri: string): Thenable<azdata.ListDatabasesResult> {
+		return undefined;
+	}
+
+	changeDatabase(connectionUri: string, newDatabase: string): Thenable<boolean> {
+		return undefined;
+	}
+
+	getConnectionString(connectionUri: string): Thenable<string> {
+		return undefined;
+	}
+
+	rebuildIntelliSenseCache(connectionUri: string): Thenable<void> {
+		return undefined;
+	}
+
+	registerOnConnectionComplete(handler: (connSummary: azdata.ConnectionInfoSummary) => any) {
+		return undefined;
+	}
+
+	registerOnIntelliSenseCacheComplete(handler: (connectionUri: string) => any) {
+		return undefined;
+	}
+
+	registerOnConnectionChanged(handler: (changedConnInfo: azdata.ChangedConnectionInfo) => any) {
+		return undefined;
+	}
+}