fix(docs): only import necessary hljs languages (#155)

Author: janhassel

docs/components/MarkdownContent/index.ts

@@ -9,7 +9,7 @@ import styles from "./index.scss?inline";
 
 import { marked } from "marked";
 import { markedHighlight } from "marked-highlight";
-import hljs from "highlight.js";
+import hljs from "@/utilities/hljs";
 
 import { ContentBase } from "@/components/ContentBase";
 

docs/components/SourceCode/index.ts

@@ -7,7 +7,7 @@
 
 import styles from "./index.scss?inline";
 
-import hljs from "highlight.js";
+import hljs from "@/utilities/hljs";
 
 export class CdsEsDocsSourceCode extends HTMLElement {
   #observer = new MutationObserver(() => this.#render());

docs/utilities/hljs.ts

@@ -0,0 +1,18 @@
+/**
+ * Copyright IBM Corp. 2026
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import hljs from "highlight.js/lib/core";
+
+import xml from "highlight.js/lib/languages/xml";
+import scss from "highlight.js/lib/languages/scss";
+import shell from "highlight.js/lib/languages/shell";
+
+hljs.registerLanguage("html", xml);
+hljs.registerLanguage("scss", scss);
+hljs.registerLanguage("console", shell);
+
+export default hljs;