Add Paging, Sorting and filtering to our Generic Repository

[ParsaGachkar]

I think having a GetAll() method is not really useful in our in our repository (Except Some Edge Cases) I'm thinking of adding paging, sorting and filtering options to it. Recommending use of Specification pattern! https://www.linkedin.com/pulse/specification-pattern-c-collins-ezerioha/ https://docs.abp.io/en/abp/latest/Specifications @MostafaTech @pournasserian