chore(refacto): fix secret and use katenary schema

- add possibility to use a katenary.yaml file to setup values
- fix secret generation

generator/labels/labelStructs/mapenv.go

@@ -0,0 +1,14 @@
+package labelStructs
+
+import "gopkg.in/yaml.v3"
+
+type MapEnv map[string]string
+
+// MapEnvFrom returns a MapEnv from the given string.
+func MapEnvFrom(data string) (MapEnv, error) {
+	var mapping MapEnv
+	if err := yaml.Unmarshal([]byte(data), &mapping); err != nil {
+		return nil, err
+	}
+	return mapping, nil
+}