Add parents when it's a JSX expression

[davesnx]

Before it removed the parens, causing invalid syntax
let make ~children = <LabeledInput labelElement=(<Icon.Edit />) />

ocamlformat-mlx: Cannot process "src/components/ProjectInfoEditor.mlx".
  Please report this bug at https://github.com/ocaml-ppx/ocamlformat/issues.
  BUG: generating invalid ocaml syntax.

This PR checks if it's a JSX expr and adds them

$ echo 'let _ = <div element=(<span />) />' | fmt
let _ = <div element=(<span />) />
$ echo 'let _ = <div element=(<Componient />) />' | fmt
let _ = <div element=(<Componient />) />
$ echo 'let _ = <Big element=(<Component />) />' | fmt
let _ = <Big element=(<Component />) />

[andreypopp]

@davesnx this looks good to merge, or anything else is missing?

[davesnx]

it's good to go