Update Button increment, add watch script, and remove package-lock

- Change Button onClick increment from 1 to 2
- Add "watch" script to package.json for development with tsup --watch
- Remove package-lock.json (likely switching to a different package manager)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: moishinetzer

lib/Button.tsx

@@ -10,7 +10,7 @@ export function Button({ type, size }: ButtonProps) {
 
   return (
     <button
-      onClick={() => setCount((count) => count + 1)}
+      onClick={() => setCount((count) => count + 2)}
       className={
         style.button +
         " " +