docs(string): add truncateMiddle examples

Author: unrevised6419

src/string.ts

@@ -44,6 +44,12 @@ export function initials(name: Maybe<string>): Optional<string> {
  * There are cases where important information is at the end of the string and truncating the end isn't helpful.
  * This function solves that.
  *
+ * @example
+ * truncateMiddle('Hello, world!', 5, 6); // 'Hello&hellip;world!'
+ * truncateMiddle('Hello, world!', 5, 0); // 'Hello&hellip;'
+ * truncateMiddle('Hello, world!', 0, 6); // '&hellip;world!'
+ * truncateMiddle('Hello, world!', 0, 0); // 'Hello, world!'
+ *
  * @license https://github.com/kahwee/truncate-middle#license
  * @param str - String to be truncated
  * @param frontLen - Number of characters to be remained in front