refactor(tts): remove InputError class and use native Error

tts.ts

@@ -12,10 +12,6 @@ import { execa } from "execa";
 import { Window } from "happy-dom";
 import wrapAnsi from "wrap-ansi";
 
-class InputError extends Error {
-  override name = "InputError";
-}
-
 async function main() {
   const start = Date.now();
 
@@ -48,9 +44,7 @@ async function main() {
   }
 
   if (!input) {
-    throw new InputError(
-      "No input was given. Use positional arguments or stdin.",
-    );
+    throw new Error("No input was given. Use positional arguments or stdin.");
   }
 
   if (url) {
@@ -61,7 +55,7 @@ async function main() {
     await window.happyDOM.waitUntilComplete();
     const readable = new Readability(doc).parse();
     if (!readable?.textContent) {
-      throw new InputError(
+      throw new Error(
         "Unable to read webpage. This usually means it's blocking scrapers.",
       );
     }