Server - Paging for jokes and submissions

[Sv443]

• Add capability to divide the data into pages and return a selected page through a URL param - closes Joke Search Paginated API #459
  • for the GET jokes endpoint
  • for the GET submissions endpoint
• TBD: allow setting page size within x bounds (maybe higher for paid tier), else default to value y

I imagine something like this, where the structure only gets changed if the page parameter is present:

GET /jokes?page=1&page-size=5

{
  data: [
    { /* joke 1 */ },
    { /* joke 2 */ },
    { /* joke 3 */ },
    { /* joke 4 */ },
    { /* joke 5 */ }
  ],
  paging: {
    currentPage: 1,
	totalPages: 12,
    totalItems: 57,
    pageSize: 5,
  }
}