🐛 BUG: Plugin does not respect Prettier's existing JSX inline expression formatting

[icorbrey]

Describe the Bug

When formatting Astro files with Prettier and this plugin, JSX expressions are not formatted the same as when you use Prettier on JSX. If for example you have elements being conditionally rendered based on a value, Astro will place the value on a new line instead of on the same line as the brace:

---
const baz = true;
---

<div class="bar">
  {
    !!baz && (
      <>
        <span>Kek</span>
        <span>Kek</span>
        <span>Kek</span>
      </>
    )
  }
</div>

// Foo.jsx

const Foo = ({ baz }) => (
  <div class="bar">
    {!!baz && (
      <>
        <span>Kek</span>
        <span>Kek</span>
        <span>Kek</span>
      </>
    )}
  </div>
);

This is invalid behavior and should be corrected.

Steps to Reproduce

1. npm init astro using default template.
2. Add prettier-plugin-astro.
3. Add the following into a file:

   ---
   const baz = true;
   ---
   
   <div class="bar">
     {!!baz && (
       <>
         <span>Kek</span>
         <span>Kek</span>
         <span>Kek</span>
       </>
     )}
   </div>

4. Format the file using Prettier.
5. Error! The formatting is not maintained, and !!baz... is placed on a new line.

[icorbrey]

I believe it may have something to do with this line:

prettier-plugin-astro/src/printer/embed.ts

Line 95 in 1f2b7de

return group(['{', indent([softline, astroDoc]), softline, lineSuffixBoundary, '}']);

This is (as far as I can tell) the equivalent handler in Prettier itself: https://github.com/prettier/prettier/blob/34f6badf2d6f3004642711a391e9a0d3c547d317/src/language-js/print/jsx.js#L562-L595

It looks like they're explicitly handling whether the expression itself should be inline (separately from whether the subvalue should be inline).