`curl_translate()` should extract query parameters

``` r
httr2::curl_translate("curl http://x.com?string=abcde&b=2")
```

gives

```r
request("http://x.com?string=abcde&b=2") %>% 
  req_perform()
```

It would be much nicer if this were

```r
request("http://x.com") %>% 
  req_url_query(
    string = "abcde",
    b = "2",
  ) %>% 
  req_perform()
```
