Update command descriptions

Signed-off-by: Oliver Davies <oliver@oliverdavies.uk>

cmd/create.go

@@ -11,13 +11,8 @@ import (
 var createCmd = &cobra.Command{
 	Use:     "create",
 	Aliases: []string{"c", "n", "new"},
-	Short:   "A brief description of your command",
-	Long: `A longer description that spans multiple lines and likely contains examples
-and usage of using your command. For example:
-
-Cobra is a CLI library for Go that empowers applications.
-This application is a tool to generate the needed files
-to quickly create a Cobra application.`,
+	Short:   "Create a new zettel",
+	Long:    `zet create|new|c|n TITLE`,
 	Run: func(cmd *cobra.Command, args []string) {
 		title := ""