TsConfigJson: Add rewriteRelativeImportExtensions (#1262)

Author: privatenumber

source/tsconfig-json.d.ts

@@ -612,6 +612,13 @@ export namespace TsConfigJson {
 		*/
 		removeComments?: boolean;
 
+		/**
+		Rewrite '.ts', '.tsx', '.mts', and '.cts' file extensions in relative import paths to their JavaScript equivalent in output files.
+
+		@default false
+		*/
+		rewriteRelativeImportExtensions?: boolean;
+
 		/**
 		Specifies the root directory of input files.