feat: add generation of api-keys to cli (#87)

* feat: add generate option in cli and the documentation

Signed-off-by: Thomas Schuetz <thomas.schuetz@t-sc.eu>

* chore: release 0.1.0

Release-As: 0.1.0
Signed-off-by: Thomas Schuetz <thomas.schuetz@t-sc.eu>

* fix: apply suggestions from code review

Co-authored-by: Alex Jones <alexsimonjones@gmail.com>
Signed-off-by: Thomas Schuetz <thomas.schuetz@t-sc.eu>

---------

Signed-off-by: Thomas Schuetz <thomas.schuetz@t-sc.eu>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>

cmd/generate/generate.go

@@ -0,0 +1,62 @@
+package generate
+
+import (
+	"fmt"
+	"github.com/fatih/color"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"os/exec"
+	"runtime"
+	"time"
+)
+
+var (
+	backend string
+)
+
+// generateCmd represents the auth command
+var GenerateCmd = &cobra.Command{
+	Use:   "generate",
+	Short: "Generate Key for your chosen backend (opens browser)",
+	Long:  `Opens your browser to generate a key for your chosen backend.`,
+	Run: func(cmd *cobra.Command, args []string) {
+
+		backendType := viper.GetString("backend_type")
+		if backendType == "" {
+			// Set the default backend
+			backend = "openai"
+		}
+		// override the default backend if a flag is provided
+		if backend != "" {
+			backendType = backend
+		}
+		fmt.Println("")
+		color.Green("Opening: https://beta.openai.com/account/api-keys to generate a key for %s", backendType)
+		color.Green("Please copy the generated key and run `k8sgpt auth` to add it to your config file")
+		fmt.Println("")
+		time.Sleep(5 * time.Second)
+		openbrowser("https://beta.openai.com/account/api-keys")
+	},
+}
+
+func init() {
+	// add flag for backend
+	GenerateCmd.Flags().StringVarP(&backend, "backend", "b", "openai", "Backend AI provider")
+}
+
+func openbrowser(url string) {
+	var err error
+	switch runtime.GOOS {
+	case "linux":
+		err = exec.Command("xdg-open", url).Start()
+	case "windows":
+		err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
+	case "darwin":
+		err = exec.Command("open", url).Start()
+	default:
+		err = fmt.Errorf("unsupported platform")
+	}
+	if err != nil {
+		fmt.Println(err)
+	}
+}