feat(home): add helm home command

cmd/helm/home.go

+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var longHomeHelp = `
+This command displays the location of HELM_HOME. This is where
+any helm configuration files live.
+`
+
+var homeCommand = &cobra.Command{
+	Use:   "home",
+	Short: "Displays the location of HELM_HOME",
+	Long:  longHomeHelp,
+	Run:   Home,
+}
+
+func init() {
+	RootCommand.AddCommand(homeCommand)
+}
+
+func Home(cmd *cobra.Command, args []string) {
+	fmt.Println("helm home was called")
+}