Add a feature to stored all needed scopes into the request

this feature provided a tool to store some scopes for future usages during the page processing
AssetsRequestContext learn the flag 'alreadyRendered'

It's provide a status for a possible duplicate usage the 'assets extraction' from stored scopes during the request lifecycle
extends capabilities of Assets Tag

- 'dandelion:asset' provide the capability to store some scopes during the request lifecycle
- 'dandelion:assets' provide the same capability of 'dandelion:asset' but inject into request output all the assets from stored scopes