Add more starlark configuration examples to cookbook

[juliexxia]

I'm in favor of deleting the --define/select() example because build settings can accomplish the same thing and are basically the new and improved --define. But if reviewers think we should keep it in I'm amenable to that as well.

Update 07_select_on_build_setting

Add 08_deps_with_different_platforms Add 09_config_inside_rule_impl