swc-loader does not expose filename or other programmatic options to plugins

[rametta]

When using swc, there is an option for providing the filename which can be passed down to plugins, but when using the swc-loader, the filename is not passed automatically as in the way babel-loader does it.

This makes it impossible for swc plugins using swc-loader to know the current filename and path being processed and have logic around that, along with all the other swc programatic options that could be useful to plugins.

[PepijnSenders]

@rametta I created a patch for our SWC loader:

programmaticOptions.plugin = programmaticOptions.plugin({
  filename,
  sourceFileName: programmaticOptions.sourceFileName
});

The loader has the filename, and just passing the plugin to the loader like this: (options) => (m) => new SWCPlugin(options).visitProgram(m). Not the cleanest, so not sure if I'll create a PR for this yet, but works for us.