This PR introduces a new installer and uninstaller for the Windows platform.
Both are written in Rust and compiled to a single executable. The executable has no dependencies (other than what is included in the Windows), links the C++ runtime statically if needed.
The change is motivated by numerous issues with with the `electron-builder`-generated installers. The new installer should behave better, not have issues with long paths and unblock the `electron-builder` upgrade (which will significantly simplify the workflow definitions).
To build an installer, one needs to provide the unpacked application (generated by `electron-builder`) and the `electron-builder` configuration (with a few minor extensions). Code signing is also supported.
