Add github endpoint API endpoint and CLI code

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

cmd/garm-cli/cmd/github.go

@@ -0,0 +1,30 @@
+package cmd
+
+import "github.com/spf13/cobra"
+
+var (
+	endpointName        string
+	endpointBaseURL     string
+	endpointUploadURL   string
+	endpointAPIBaseURL  string
+	endpointCACertPath  string
+	endpointDescription string
+)
+
+// githubCmd represents the the github command. This command has a set
+// of subcommands that allow configuring and managing GitHub endpoints
+// and credentials.
+var githubCmd = &cobra.Command{
+	Use:          "github",
+	Aliases:      []string{"gh"},
+	SilenceUsage: true,
+	Short:        "Manage GitHub resources",
+	Long: `Manage GitHub related resources.
+
+This command allows you to configure and manage GitHub endpoints and credentials`,
+	Run: nil,
+}
+
+func init() {
+	rootCmd.AddCommand(githubCmd)
+}