This PR consists of two components:
* `ci/Jenkinsfile.build` - CI build for both Linux, MacOS, and Windows
* `ci/Jenkinsfile.release` - Meta-build that combines two above.
The purpose of the `release` job is to create a single GitHub releas
that combines artifacts from all build jobs.
The GitHub release created is in Draft mode and needs to be edited
to update description and published.
Signed-off-by: Jakub Sokołowski <jakub@status.im>