Proxy service not code-splitable

[aklinker1]

For example, the this service imports minimatch to use it in the real implementation, but minimatch is included in the final bundle in all entrypoints, not just the background.

Unfortunately, I can't think of a way to accomplish tree shaking without putting the real service and proxy service in a separate file. The more services you have, the more annoying it would be... Just lots of extra files in a project.

Maybe an alternative package, like @webext-core/background-api could be used to group all services under a single object.