chore: standardize ESM-first architecture and resolve all type/test/lint errors

commitlint.config.cjs

@@ -0,0 +1,10 @@
+/* eslint-disable no-undef */
+/* eslint-env node */
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules: {
+    'header-max-length': [2, 'always', 500],
+    'subject-case': [0],
+    'subject-full-stop': [0],
+  },
+};