feat: add helper to convert isostrings to localeString

public/src/modules/helpers.common.js

@@ -28,6 +28,7 @@ module.exports = function (utils, Benchpress, relative_path) {
 		generateRepliedTo,
 		generateWrote,
 		register,
+		isoTimeToLocaleString,
 		__escape: identity,
 	};
 
@@ -337,6 +338,10 @@ module.exports = function (utils, Benchpress, relative_path) {
 		return `[[topic:wrote-${langSuffix}, ${relative_path}/post/${post.pid}, ${post.timestampISO}]]`;
 	}
 
+	function isoTimeToLocaleString(isoTime) {
+		return new Date(isoTime).toLocaleString().replace(/,/g, ',');
+	}
+
 	function register() {
 		Object.keys(helpers).forEach(function (helperName) {
 			Benchpress.registerHelper(helperName, helpers[helperName]);