WIP: Refactor SendE2e to return a SendReport object

auth/utils_test.go

bindings/e2eHandler.go

bindings/json_test.go

cmd/root.go

connect/connect.go

e2e/critical.go

e2e/interface.go

e2e/manager.go

e2e/rekey/exchange.go

e2e/rekey/rekey.go

e2e/rekey/trigger.go

e2e/rekey/trigger_test.go

e2e/rekey/utils_test.go

e2e/sendE2E.go

e2e/sendE2E_test.go

groupChat/e2eManager_test.go

groupChat/interface.go

ud/mockE2e_test.go