Add pagination and filtering to directions, departments and classes

[DmyMi]

• Add pagination to Direction, Department & Class get all endpoints.
• Add an ability to find a Direction by a word (substring) in the Direction, Department or Class title (e.g, user types футбол and the filter should return a list containing 1 or more Direction where this word might be included in department or class or direction name). If nothing is found - return 204 code.
  • User should type at least 3 letters (return 204 otherwise)
  • Add pagination optionally.