fix(cli): Fix rule yaml indent and provide feedback

Fix the wrong indentation in the rule labels and provide
the feedback to user after creating the rule file.

Author: rabbitstack

cmd/fibratus/app/rules/create.go

@@ -20,6 +20,7 @@ package rules
 
 import (
 	"fmt"
+	"github.com/enescakir/emoji"
 	"github.com/google/uuid"
 	"github.com/rabbitstack/fibratus/pkg/config"
 	"github.com/rabbitstack/fibratus/pkg/util/version"
@@ -37,7 +38,7 @@ description: |
 {{- if .Labels }}
 labels:
 {{- range $key, $value := .Labels }}
-   {{ $key }}: {{ $value }}
+  {{ $key }}: {{ $value }}
 {{- end -}}
 {{ end }}
 
@@ -99,5 +100,7 @@ func createRule(name string) error {
 		return err
 	}
 
+	emo("%v created %s. Open the file and craft the rule condition, define an optional action, or fill out other attributes", emoji.Rocket, n)
+
 	return nil
 }