Add filtering, sorting and pagination to the REST API code

[brothercorvo]

• filtering: ability to send parameters to a query and only get the relevant objects
• sorting: ability to returns lists in a certain order
• pagination: ability to split long lists in different sets

how to implement this:

• introduce supporting classes
• create a reference implementation
• modify the OAS to DP generator to produce the code

[brothercorvo]

@naman108 this could be another feature for future works