chore: migrate oxlint & oxfmt (#15464)

#### PR Dependency Tree


* **PR #15464** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Replaced the project’s formatting and linting workflow with Oxfmt and
Oxlint.
* Added shared formatting and linting configuration, editor integration,
and updated automated checks.
* Updated generated files, scripts, and lint guidance to use the new
tooling.

* **Style**
* Reformatted templates, source code, examples, and configuration files
for consistent readability.
  * No user-facing functionality or rendering behavior changed.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/mails/components/template.tsx

@@ -165,7 +165,7 @@ function fetchContent(
 
   if (Array.isArray(content.props.children)) {
     return content.props.children.map((child, i) => {
-      /* oxlint-disable-next-line eslint-plugin-react/no-array-index-key */
+      /* oxlint-disable-next-line react/no-array-index-key */
       return <Row key={i}>{child}</Row>;
     });
   }