Fire an event when ZSS completed client-side paste

ZSS-1368

Functional Requirements

1. Such event is fired after a paste is done at server-side which means calling Range::getCellValue() in such event listener returns the pasted value.
For example, if a user pastes myvalue at a blank cell, A1. Calling a1Range.getCellValue() in such event listener returns myvalue instead of empty string.
2. Such event provides the area changed by the paste action.
For example, if a user pastes a 2 * 2 range from Excel, click A1 and paste. The event should provide a methods that returns the range A1:B2.