chore: refactor structure

internal/game/cmd_group.go

@@ -0,0 +1,22 @@
+package game
+
+import (
+	"github.com/iliadenisov/galaxy/internal/controller"
+	"github.com/iliadenisov/galaxy/internal/model/game"
+)
+
+func JoinEqualGroups(configure func(*controller.Param), race string) (err error) {
+	control(configure, func(c *controller.Ctrl) {
+		c.Execute(func(r controller.Repo, g game.Game) {
+			err = joinEqualGroups(r, g, race)
+		})
+	})
+	return
+}
+
+func joinEqualGroups(r controller.Repo, g game.Game, race string) error {
+	if err := g.JoinEqualGroups(race); err != nil {
+		return err
+	}
+	return r.SaveState(g)
+}