JPMS

[jwharm]

With this PR, the code generator will write module-info.java files in all modules. The generator will automatically export the generated package name and all source code packages from src/main/java (if any exist), and will add require transitive statements for all dependencies.

For example, the module-info.java file for Gtk is:

module org.gnome.gtk {
    requires org.jetbrains.annotations;
    requires transitive org.gnome.gdk;
    requires transitive org.gnome.gsk;
    exports org.gnome.gtk;
    exports io.github.jwharm.javagi.gtk.types;
    exports io.github.jwharm.javagi.gtk.annotations;
    exports io.github.jwharm.javagi.gtk.util;
}