Generate renderers in a stable sort order (#2611)

Author: srawlins

lib/src/generator/templates.dart

@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Annotations only appear on other pages, so there is no template data here.
-@Renderer(#renderAnnotation, Context<Annotation>())
 @Renderer(#renderCategory, Context<CategoryTemplateData>(),
     visibleTypes: _visibleTypes)
 @Renderer(#renderClass, Context<ClassTemplateData>())
@@ -51,6 +49,7 @@ const _visibleTypes = {
   FeatureSet,
   LanguageFeature,
   Library,
+  LibraryContainer,
   Method,
   ModelElement,
   Package,