feat(refacto): move everything in internal package

This allows to install katenary with `go install` and to clean up the
project folder.

internal/generator/labels.go

@@ -0,0 +1,34 @@
+package generator
+
+import (
+	"fmt"
+	"github.com/katenary/katenary/internal/generator/labels"
+)
+
+var componentLabel = labels.LabelName("component")
+
+// GetLabels returns the labels for a service. It uses the appName to replace the __replace__ in the labels.
+// This is used to generate the labels in the templates.
+func GetLabels(serviceName, appName string) map[string]string {
+	labels := map[string]string{
+		componentLabel: serviceName,
+	}
+
+	key := `{{- include "%s.labels" . | nindent __indent__ }}`
+	labels[`__replace_`+serviceName] = fmt.Sprintf(key, appName)
+
+	return labels
+}
+
+// GetMatchLabels returns the matchLabels for a service. It uses the appName to replace the __replace__ in the labels.
+// This is used to generate the matchLabels in the templates.
+func GetMatchLabels(serviceName, appName string) map[string]string {
+	labels := map[string]string{
+		componentLabel: serviceName,
+	}
+
+	key := `{{- include "%s.selectorLabels" . | nindent __indent__ }}`
+	labels[`__replace_`+serviceName] = fmt.Sprintf(key, appName)
+
+	return labels
+}