Add new classes to wikitext created emphasised elements to make them easily stylable (#8163)

* allow internal link to be wikitex formatted as bold

* fix typo

* add new classes to all emphasis and inline-code elements

* fix tests for new STRONG classes

core/modules/parsers/wikiparser/rules/codeinline.js

@@ -48,6 +48,9 @@ exports.parse = function() {
 		tag: "code",
 		children: [{
 			type: "text",
+			attributes: {
+				class: {type: "string", value: "tc-emphasis tc-code"}
+			},
 			text: text,
 			start: start,
 			end: this.parser.pos