Add iso builder

This adds a new package for the iso builder run directly on go.
This is extracted from the original elemental-cli and then from the now
build-less kairos-agent

This uses no deps on elemental, only deps are on kairos-agent for the
config stuff mainly.

Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>

tools-image/enki/internal/version/version.go

@@ -0,0 +1,36 @@
+package version
+
+import (
+	"runtime"
+)
+
+var (
+	version = "v0.0.1"
+	// gitCommit is the git sha1
+	gitCommit = ""
+)
+
+// BuildInfo describes the compile time information.
+type BuildInfo struct {
+	// Version is the current semver.
+	Version string `json:"version,omitempty"`
+	// GitCommit is the git sha1.
+	GitCommit string `json:"git_commit,omitempty"`
+	// GoVersion is the version of the Go compiler used.
+	GoVersion string `json:"go_version,omitempty"`
+}
+
+func GetVersion() string {
+	return version
+}
+
+// Get returns build info
+func Get() BuildInfo {
+	v := BuildInfo{
+		Version:   GetVersion(),
+		GitCommit: gitCommit,
+		GoVersion: runtime.Version(),
+	}
+
+	return v
+}