support multi-module (#4)

* add multimodule
* re-package modules

model/rest/status.go

@@ -0,0 +1,16 @@
+package rest
+
+import "github.com/google/uuid"
+
+type StateResponse struct {
+	ID      uuid.UUID     `json:"id"`
+	Turn    uint          `json:"turn"`
+	Stage   uint          `json:"stage"`
+	Players []PlayerState `json:"player"`
+}
+
+type PlayerState struct {
+	ID      uuid.UUID `json:"id"`
+	Name    string    `json:"name"`
+	Extinct bool      `json:"extinct"`
+}