- Makefile: cross-compile to linux/{amd64,arm64}, darwin/{amd64,arm64},
windows/amd64 into dist/ with SHA256SUMS. Version is stamped via
-ldflags '-X main.version=...'.
- .gitea/workflows/release.yml: on tag push (v*) the workflow runs
`make dist`, creates a Gitea release for the tag and uploads every
artefact from dist/ via the Gitea API.
- main.go: `rb-search version` / --version prints the stamped version.
- README: new "Готовые бинари" section with curl/Invoke-WebRequest
install snippets and a checksum-verify hint.
