refactor: make cli modular (#390)

* refactor: make cli modular

* chore: apply suggestion from @Rycochet

Co-authored-by: Ryc O'Chet <Rycochet@users.noreply.github.com>

* chore: apply review suggestions

* refactor: no need to handle user escaping in verify cmd

---------

Co-authored-by: Ryc O'Chet <Rycochet@users.noreply.github.com>

cmd/version.go

@@ -7,17 +7,36 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var versionCmd = &cobra.Command{
-	Use:   "version",
-	Short: "Print the version number of Tinyauth",
-	Long:  `All software has versions. This is Tinyauth's`,
-	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Printf("Version: %s\n", config.Version)
-		fmt.Printf("Commit Hash: %s\n", config.CommitHash)
-		fmt.Printf("Build Timestamp: %s\n", config.BuildTimestamp)
-	},
+type versionCmd struct {
+	root *cobra.Command
+	cmd  *cobra.Command
 }
 
-func init() {
-	rootCmd.AddCommand(versionCmd)
+func newVersionCmd(root *cobra.Command) *versionCmd {
+	return &versionCmd{
+		root: root,
+	}
+}
+
+func (c *versionCmd) Register() {
+	c.cmd = &cobra.Command{
+		Use:   "version",
+		Short: "Print the version number of Tinyauth",
+		Long:  `All software has versions. This is Tinyauth's.`,
+		Run:   c.run,
+	}
+
+	if c.root != nil {
+		c.root.AddCommand(c.cmd)
+	}
+}
+
+func (c *versionCmd) GetCmd() *cobra.Command {
+	return c.cmd
+}
+
+func (c *versionCmd) run(cmd *cobra.Command, args []string) {
+	fmt.Printf("Version: %s\n", config.Version)
+	fmt.Printf("Commit Hash: %s\n", config.CommitHash)
+	fmt.Printf("Build Timestamp: %s\n", config.BuildTimestamp)
 }