feat: support the new angular "@-syntax"

Angular v17 introduces a new syntax that is not compatible anymore with pure HTML.
This PR introduces a new component for the languages "angular" and its alias "ng".

components/angular.js

@@ -0,0 +1,15 @@
+(function (Prism) {
+  Prism.languages.angular = Prism.languages.extend('markup', {
+    'keyword': /(?:@if|@for|@switch|@defer|@loading|@error|@placeholder|prefetch)\b/,
+    'operator': /\b(?:on|when)\b/,
+    'number': {
+      pattern: /\b(minimum|after)\s+\d+(?:s|ms|)/gi,
+      lookbehind: true,
+    },
+    'builtin': {pattern: /\b(?:viewport|timer|minimum|after|hover|idle|immediate|interaction)/},
+    'function':
+      /#?(?!\s)[_$a-zA-Z\xA0-\uFFFF](?:(?!\s)[$\w\xA0-\uFFFF])*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,
+  });
+
+  Prism.languages.ng = Prism.languages.angular;
+})(Prism);