Add macro methods for Include and Extend

[HertzDevil]

Resolves part of #3274.

Note that #14063 is not required for these nodes to be accessible in the macro language, because grammatically include and extend can be directly passed to macros:

module Foo
  macro foo(x)
    {% p! x, x.name, x.class_name %} # okay
  end

  foo include Foo
  foo extend Foo
end