Add Prism.js.

frontend/package.json

@@ -20,6 +20,7 @@
     "@angular/platform-browser": "^17.0.0",
     "@angular/platform-browser-dynamic": "^17.0.0",
     "@angular/router": "^17.0.0",
+    "clipboard": "^2.0.11",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0",
     "zone.js": "~0.14.2"
@@ -37,4 +38,4 @@
     "karma-jasmine-html-reporter": "~2.1.0",
     "typescript": "~5.2.2"
   }
-}
+}