add use for all enums to make the docs build

I got no Idea if there is a better way to do this without importing all the enums but since it is only the docs I think it's fine.

src/generator/templates/api/lib/mbuild.mako

@@ -345,6 +345,7 @@ ${self._setter_fn(resource, method, m, p, part_prop, ThisType, c)}\
         request_value_type = request_value.id
 %>\
 <%block filter="test_block_filter">\
+use ${util.library_name()}::api::enums::*;
 ${capture(util.test_prelude) | hide_filter}\
 % if request_value:
 use ${util.library_name()}::api::${request_value_type};