Adds `no-async-endpoint-handlers` rules, which bans async functions used as endpoint handlers in Express applications. These do not get caught by Express' error handler, causing the server to crash with an unhandled process rejection error.
```js
app.use(async (req, res) => {
const foo = await api.getFoo(req.query) // server panics if this function rejects
return res.json(foo)
})
```
I could not find this rule implemented in any ESLint plugin, but this is a problem I see quite often and I'm tired of dealing with it. I've added it to `oxc` for now, but we should consider adding an `express` or `api` plugin in the future.
I got tired of seeing useless spreads on ternaries and `arr.reduce()` within my company's internal codebase so I overhauled this rule.
## Changes
- add fixer for object spreads
```js
const before = { a, ...{ b, c }, d }
const after = { a, b, c, d } // fixer does not dedupe spaces before `b`
```
- recursively check for useless clones on complex expressions. This rule now catches and auto-fixes the following cases:
```js
// ternaries when both branches create a new array or object
const obj = { ...(foo ? { a: 1 } : { b: 2 }) }
// recursive, so this can support complex cases
const arr = [ ...(foo ? a.map(fn) : bar ? Array.from(iter) : await Promise.all(bar)) ]
// reduce functions where the initial accumulator creates a new object or array
const obj = { ...(arr.reduce(fn, {}) }
```
