LoaderUtils: Deprecate `decodeText()`. (#28278)

* remove decodetext from src

* Revert "remove decodetext from src"

This reverts commit b76afcdf74198c3632769243c85f1451b9aaaade.

* deprecate decodeText()

src/loaders/LoaderUtils.js

@@ -1,6 +1,8 @@
 class LoaderUtils {
 
-	static decodeText( array ) {
+	static decodeText( array ) { // @deprecated, r165
+
+		console.warn( 'THREE.LoaderUtils: decodeText() has been deprecated with r165 and will be removed with r175. Use TextDecoder instead.' );
 
 		if ( typeof TextDecoder !== 'undefined' ) {