Summary

Port webpack/webpack#18620.

Changes overview:

1. add module-import external type.
2. change external type to module-import by default when output.module is enabled (not all cases could be ported as we lack other feature supports at preset).
3. sync up documentation.

Potentially problematic changes:

Added rspack_plugin_javascript to the dep of rspack_plugin_externals to use some variables, is it ok to do so?

rspack_plugin_javascript = { path = "../rspack_plugin_javascript" }

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).