chore(cli): replace clibase with external coder/serpent (#12252)

cli/gitssh.go

@@ -13,17 +13,17 @@ import (
 
 	"golang.org/x/xerrors"
 
-	"github.com/coder/coder/v2/cli/clibase"
 	"github.com/coder/coder/v2/cli/cliui"
 	"github.com/coder/pretty"
+	"github.com/coder/serpent"
 )
 
-func (r *RootCmd) gitssh() *clibase.Cmd {
-	cmd := &clibase.Cmd{
+func (r *RootCmd) gitssh() *serpent.Cmd {
+	cmd := &serpent.Cmd{
 		Use:    "gitssh",
 		Hidden: true,
 		Short:  `Wraps the "ssh" command and uses the coder gitssh key for authentication`,
-		Handler: func(inv *clibase.Invocation) error {
+		Handler: func(inv *serpent.Invocation) error {
 			ctx := inv.Context()
 			env := os.Environ()