fix: switch to ESM export to avoid mixed format

The CLI entrypoint was using `module.exports` alongside ESM `import` statements,
resulting in an invalid mixed module format. Replaced the CommonJS export with
a proper ESM `export` to maintain consistency and prevent module resolution issues.

bin/task-master.js

@@ -373,8 +373,4 @@ if (process.argv.length <= 2) {
 }
 
 // Add exports at the end of the file
-if (typeof module !== 'undefined') {
-	module.exports = {
-		detectCamelCaseFlags
-	};
-}
+export { detectCamelCaseFlags };