Collection.isEmpty, .$., .$[]., improved documentation website ### DSL - Added the filter operator Collection.isEmpty (#21, !21) - Added the filter operator Collection.isNotEmpty (#21, !21) - Added the positional operator: .$. (!22) - Added the all positional operator: .$[]. (!22) ### Website - Added a documentation page for CRUD operations (!22) - Added a documentation page for bulkWrite (!22) - Added a documentation page for nested fields access, including arrays (!22)