ci: add GitHub Actions test pipeline and GoReleaser releases for oo

Mirror eSlider/go-config: release-please for semver, tag-triggered GoReleaser
builds cross-platform oo binaries with embedded version metadata.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/oo/common.go

@@ -21,6 +21,7 @@ var rootCmd = &cobra.Command{
 	Use:           "oo",
 	Short:         "OnlyOffice Workspace CLI — subject-based command tree",
 	Long:          "oo is a thin CLI over github.com/eslider/go-onlyoffice.\nCommands are grouped by OnlyOffice subject (calendar, projects, tasks, users, persons, companies, opportunities, cases, crm-tasks, applications).",
+	Version:       version,
 	SilenceUsage:  true,
 	SilenceErrors: false,
 }

cmd/oo/version.go

@@ -0,0 +1,8 @@
+package main
+
+// Build metadata injected at release time via -ldflags (GoReleaser).
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)