Merge from vscode merge-base (#22769)

* Merge from vscode merge-base

* Turn off basic checks

* Enable compilation, unit, and integration tests

extensions/markdown-language-features/server/src/node/main.ts

@@ -0,0 +1,19 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Connection, createConnection } from 'vscode-languageserver/node';
+import { startServer } from '../server';
+
+// Create a connection for the server.
+const connection: Connection = createConnection();
+
+console.log = connection.console.log.bind(connection.console);
+console.error = connection.console.error.bind(connection.console);
+
+process.on('unhandledRejection', (e: any) => {
+	connection.console.error(`Unhandled exception ${e}`);
+});
+
+startServer(connection);