feat: Convert helpers to use JS files

packages/backend/src/helpers/compile-email.ee.js

@@ -0,0 +1,12 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as handlebars from 'handlebars';
+
+const compileEmail = (emailPath, replacements = {}) => {
+  const filePath = path.join(__dirname, `../views/emails/${emailPath}.ee.hbs`);
+  const source = fs.readFileSync(filePath, 'utf-8').toString();
+  const template = handlebars.compile(source);
+  return template(replacements);
+};
+
+export default compileEmail;