Add latest version filter to GET plugins resources endpoint

[stiliyan-v]

User Story:
As an API user,
I want to to be able to access simplier endpoints
so that external systems as well as the UI can access easily often used data
 
Description:

Retrieve plugins-resources information

GET /plugins/resources/<data-type>/latest

• returns a list of all latest entries for a each data-type without content

GET /plugins/resources/<data-type>/<name>

• returns a list of all versions for a specific data-type without providing the content of the resource

GET /plugins/resources/<data-type>/<name>/versions

• returns a list of versions for specific data-type and name without content

GET /plugins/resources/<data-type>/<name>/<version>

• returns a specific version of a specific data-type including the resource content

GET /plugins/resources/<data-type>/<name>/latest

• returns latest entry for a specific data-type with resource content

Deleting data-types

DELETE /plugins/resources/<data-type>/<name>

• deletes all versions for a specific data-type