* Makefile: refactoring
- added signing of windows exe in a zip package
- removed Windows build from goreleaser
- removed homebrew from goreleaser
- enabled incremental builds
* ci: publish scoop package
* ci: publish additional binaries as artifacts
* ci: install {htmlui,app}/node_modules as part of ci-setup
* ci: added retry to improve robustness of builds
* ci: continue-on-error for non-pull-requests
* ci: moved publish-packages to Stage And Publish Artifacts phase
This is enabled by `kopia server --ui` and can be viewed in a browser
at http://localhost:51515/
Right now it can only list snapshots and policies (barely).