Implement password change endpoint

* move email templates to server

apps/server/src/integrations/transactional/emails/change-password-email.tsx

@@ -0,0 +1,23 @@
+import { Section, Text } from '@react-email/components';
+import * as React from 'react';
+import { content, paragraph } from '../css/styles';
+import { MailBody } from '../partials/partials';
+
+interface ChangePasswordEmailProps {
+  username?: string;
+}
+
+export const ChangePasswordEmail = ({ username }: ChangePasswordEmailProps) => {
+  return (
+    <MailBody>
+      <Section style={content}>
+        <Text style={paragraph}>Hi {username},</Text>
+        <Text style={paragraph}>
+          This is a confirmation that your password has been changed.
+        </Text>
+      </Section>
+    </MailBody>
+  );
+};
+
+export default ChangePasswordEmail;