feat: add command to show version (#604)

* feat: add -version flag for jetkvm_app

* move code to kvm package

ota.go

@@ -50,6 +50,10 @@ const UpdateMetadataUrl = "https://api.jetkvm.com/releases"
 
 var builtAppVersion = "0.1.0+dev"
 
+func GetBuiltAppVersion() string {
+	return builtAppVersion
+}
+
 func GetLocalVersion() (systemVersion *semver.Version, appVersion *semver.Version, err error) {
 	appVersion, err = semver.NewVersion(builtAppVersion)
 	if err != nil {