refactor: replace template strings with regular string literals

Template literals are useful when you need:  1. [Interpolated strings](https://en.wikipedia.org/wiki/String_interpolation).

Author: deepsource-autofix[bot]

packages/karbon/src/runtime/utils/verbose-invariant.ts

@@ -1,5 +1,5 @@
 export function verboseInvariant(condition: unknown, message?: string): asserts condition {
   if (!condition) {
-    throw new Error(message ? `Invariant failed: ${message}` : `Invariant failed`)
+    throw new Error(message ? `Invariant failed: ${message}` : "Invariant failed")
   }
 }

packages/playground/pages/examples/[slug].vue

@@ -16,7 +16,7 @@ async function* GenSource() {
 const onMoreLoaded = (article: Article) => console.log(`article ${article.id} is added.`, article)
 
 // eslint-disable-next-line no-console
-const onDone = () => console.log(`all articles added`)
+const onDone = () => console.log("all articles added")
 const queryBy = 'title'
 const searchInput = ref('')
 </script>