Add ArchitecturyPluginExtension.fromCommon

[Juuxel]

Basic usage example:

architectury {
    // Sets up dev dependencies and production jar bundling as a one-liner.
    fromCommon ':common'
}

More complicated usage example from Arch API: Juuxel/architectury-api@39de89c

Note about the version: this isn't a breaking change, but it's a good chance to introduce some cleanup breaking changes, like removing unused properties and simplifying the extension class.

[Juuxel]

TODO: Check how this publishes. Using namedElements over the default config should prevent it from appearing in the POM though

[rhysdh540]

question-why make this in java instead of kotlin like the rest of the plugin?