feat!: switch to publishing ESM and bump major version to 3.0.0

Agent-Logs-Url: https://github.com/transcend-io/internationalization/sessions/b8aa8ce7-27d1-4267-a4d5-0b955ebe4906

Co-authored-by: bencmbrook <7354176+bencmbrook@users.noreply.github.com>

Author: Copilot

.eslintrc.js .eslintrc.cjs.eslintrc.js renamed to .eslintrc.cjs

@@ -1,12 +1,11 @@
 module.exports = {
-  require: ['ts-node/register/transpile-only'],
+  loader: ['./.pnp.loader.mjs'],
   ignore: [
     // Never look for test files in these folders
-    '**/build/**/*',
     '.yarn/**/*',
     '**/node_modules/**/*',
   ],
-  extension: ['ts'],
+  extension: ['js'],
   reporter: 'spec',
   reporterOptions: {
     configFile: 'mocha-reporter-config.json',