Remove ignore from macro doc tests

[kjvalencik]

Doc tests in neon-macros are currently ignore because it would create a recursive dependency which would prevent publishing.

However, once Neon 1.1.x is published, we can rely on the published version to break the cycle. This will remove the untested warning from the examples.

[kjvalencik]

Closing. Documentation can be moved to a re-export inside Neon.