Move generics to their own file

wow/gamedata/generics.go

@@ -0,0 +1,20 @@
+package gamedata
+
+const (
+	UP   string = "UP"
+	DOWN string = "DOWN"
+)
+
+type href struct {
+	Href string `json:"href"`
+}
+
+type idAndKey struct {
+	ID  int  `json:"id"`
+	Key href `json:"key"`
+}
+
+type idAndType struct {
+	ID   int    `json:"id"`
+	Type string `json:"type"`
+}

wow/gamedata/pvpseasonapi.go

@@ -53,20 +53,6 @@ const (
 	ClassWarriorProtection    string = "warrior-protection"
 )
 
-type href struct {
-	Href string `json:"href"`
-}
-
-type idAndKey struct {
-	ID  int  `json:"id"`
-	Key href `json:"key"`
-}
-
-type idAndType struct {
-	ID   int    `json:"id"`
-	Type string `json:"type"`
-}
-
 type PvpSeasonIndexAPI struct {
 	Seasons       []idAndKey `json:"seasons"`
 	CurrentSeason idAndKey   `json:"current_season"`