Move MD references, rename, and definition support to md LS (#155127)

extensions/markdown-language-features/server/src/config.ts

@@ -0,0 +1,24 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export interface LsConfiguration {
+	/**
+	 * List of file extensions should be considered as markdown.
+	 *
+	 * These should not include the leading `.`.
+	 */
+	readonly markdownFileExtensions: readonly string[];
+}
+
+const defaultConfig: LsConfiguration = {
+	markdownFileExtensions: ['md'],
+};
+
+export function getLsConfiguration(overrides: Partial<LsConfiguration>): LsConfiguration {
+	return {
+		...defaultConfig,
+		...overrides,
+	};
+}