feat: Add config command

Ref: #40

src/config.go

@@ -0,0 +1,82 @@
+package src
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/caffeine-addictt/video-manager/src/utils"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Head
+var configCommand = &cobra.Command{
+	Use:   "config",
+	Short: "Manage your configuration",
+}
+
+// Sub
+var configInitFlags struct {
+	yes bool
+}
+var configInitCommand = &cobra.Command{
+	Use:   "init <path?>",
+	Short: "Initialize a new configuration file",
+	Long: utils.Multiline(
+		"Initialize a new configuration file at the specified path.",
+		"If no path is specified, it will be created in the current directory.",
+	),
+	Aliases: []string{"create", "new", "reset"},
+	Args:    cobra.MaximumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		var newConfigPath string
+		if len(args) == 1 {
+			newConfigPath = args[0]
+		} else {
+			newConfigPath = "./.video-manager.yml"
+		}
+		newConfigPath = filepath.Clean(newConfigPath)
+
+		// Write config
+		if err := viper.SafeWriteConfigAs(newConfigPath); err != nil {
+			if _, ok := err.(viper.ConfigFileAlreadyExistsError); ok {
+				switch utils.InputPrompt("A configuration file already exists. Do you want to overwrite it? (y/n)") {
+				case "y", "Y":
+				default:
+					os.Exit(1)
+				}
+
+				// Force write
+				if err := viper.WriteConfigAs(newConfigPath); err != nil {
+					fmt.Println("Failed to write configuration file")
+					Debug(err.Error())
+					os.Exit(1)
+				}
+			} else {
+				fmt.Println("Failed to write configuration file")
+				Debug(err.Error())
+				os.Exit(1)
+			}
+		}
+	},
+}
+
+var configWhereCommand = &cobra.Command{
+	Use:   "which",
+	Short: "Print the path to the loaded configuration file",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(viper.ConfigFileUsed())
+	},
+}
+
+func initConfigCmd() {
+	rootCommand.AddCommand(configCommand)
+	configCommand.AddCommand(
+		configInitCommand,
+		configWhereCommand,
+	)
+
+	configInitCommand.Flags().BoolVarP(&configInitFlags.yes, "yes", "y", false, "Skip the confirmation prompt")
+}

src/root.go

@@ -92,6 +92,7 @@ func init() {
 
 	// Initialize subcommands
 	initCacheCmd()
+	initConfigCmd()
 }
 
 func initConfig() {