Not yet but it's scheduled for launch in a few months. For now, builds have to be started manually. To run same tests in different deployment environments such as staging, dev and production look at build variables.
Currently we support Windows 10 and Windows 8.1. Support for Mac OS is very near.
Currently we support Chrome, Firefox, IE11. Support for Safari and Edge is very near.
Zylitics is currently in beta and all features are yet to complete. Mobile emulation will be available in next major release of Zylitics test runner that should be available in a month or two. For now various resolution options can be used while setting up Build Capabilities.
Zylitics is designed to be the single source of truth for all your e2e tests. Zylitics keeps the source code, run history, screenshots, previews and all debug information that are always available. Since e2e tests are different from unit tests and don't test implementation paths but the expected behavior, in our opinion it is ok to keep them separately.
Not yet, but should be available in 8 to 10 months.