Create slim render package without prettier

[thena-seer]

Goals

1. Provide a version of @react-email/render with a smaller footprint.
2. Appeal to users who need to optimize build size.

Background

Build size is very important for some javascript development use cases. @react-email/components is somewhat heavy for what it does, largely due to its dependency on prettier. In a repository that is already using react, @react-email/components adds about 12 Mb of install size, with prettier taking up 7.6 Mb. Right now, users are forced to clone-and-own if they want to remove the impact of this optional functionality.

Proposal

The prettier functionality is only relevant inside of a small conditional:

if (options?.pretty) {
    return pretty(document);
  }

It would be extremely simple to provide a version of @react-email/render that does not contain this dependency. It could be a separate package, or a separate export inside of the same package.

I would be happy to help contribute.

[gabrielmfern]

Does tree shaking not remove prettier if you are not using it here? Or does the conditional make it keep it either way?

We would probably rather have it as a separate export, if anything. We could also just export the pretty function and use it instead to let tree shaking do its thing.

[thena-seer]

While I'm not an expert on tree shaking, my understanding is that prettier will always be included in the bundle anytime I import the render function because the render function contains a call to pretty which contains a call to prettier. Yes, two solutions I can think of that would allow tree-shaking to do its thing are:

1. Export pretty instead of calling it in render. Usage: const output = await pretty(await render(<MyTemplate/>))
2. Export a version of render that contains pretty and a version that doesn't. Usage: `const output = await prettyRender()

[gabrielmfern]

Number 1. is definitely the way, and was also what I was thinking. Feel free to do that in the same PR you made before #1906

[thena-seer]

Ok, PR updated!