Implement pagination correction logic

[Igorbek]

Create a function with following signature:

public static (int count, int skip) CorrectPagination(
  int totalCount,
  int count,
  int skip,
  int defaultCount = 10);

// Example
return (10, 20); // count = 10, skip = 20
return (count: 10, skip: 20);

Contract:

• totalCount >= 0
• defaultCount > 0

(should throw an appropriate exception)

Acceptance criteria:

var (count, skip) = CorrectPagination(totalCount, requestedCount, requestSkip, defaultCount);

• count > 0
• skip >= 0
• skip == 0 || skip < totalCount
• count == requestedCount || requestedCount <= 0 && count == defaultCount
• skip == requestedSkip || requestedSkip < 0 || requestedSkip >= totalCount

[Igorbek]

/cc @yuriyoleynikov see updates

[yuriyoleynikov]

Closed in #12