refactor(cmd): use factories instead of global cobra command structs

This enables us to create new commands for e2e tests.

internal/log/log.go

@@ -0,0 +1,18 @@
+package log
+
+import (
+	"log/slog"
+	"os"
+	"time"
+
+	"github.com/lmittmann/tint"
+)
+
+func init() {
+	slog.SetDefault(slog.New(
+		tint.NewHandler(os.Stderr, &tint.Options{
+			Level:      slog.LevelDebug,
+			TimeFormat: time.RFC3339,
+		}),
+	))
+}