DEV 559: Refactor CLI and add customizations (#57)

* move snake API structs into a new client package

* add customizations to snake objects

* refactor and add support for passing snake customizations in games

client/fixtures_test.go

@@ -0,0 +1,90 @@
+package client
+
+func exampleSnakeRequest() SnakeRequest {
+	return SnakeRequest{
+		Game: Game{
+			ID: "game-id",
+			Ruleset: Ruleset{
+				Name:     "test-ruleset-name",
+				Version:  "cli",
+				Settings: exampleRulesetSettings,
+			},
+			Timeout: 33,
+			Source:  "league",
+		},
+		Turn: 11,
+		Board: Board{
+			Height: 22,
+			Width:  11,
+			Snakes: []Snake{
+				{
+					ID:      "snake-0",
+					Name:    "snake-0-name",
+					Latency: "snake-0-latency",
+					Health:  100,
+					Body:    []Coord{{X: 1, Y: 2}, {X: 1, Y: 3}, {X: 1, Y: 4}},
+					Head:    Coord{X: 1, Y: 2},
+					Length:  3,
+					Shout:   "snake-0-shout",
+					Squad:   "",
+					Customizations: Customizations{
+						Head:  "safe",
+						Tail:  "curled",
+						Color: "#123456",
+					},
+				},
+				{
+					ID:      "snake-1",
+					Name:    "snake-1-name",
+					Latency: "snake-1-latency",
+					Health:  200,
+					Body:    []Coord{{X: 2, Y: 2}, {X: 2, Y: 3}, {X: 2, Y: 4}},
+					Head:    Coord{X: 2, Y: 2},
+					Length:  3,
+					Shout:   "snake-1-shout",
+					Squad:   "snake-1-squad",
+					Customizations: Customizations{
+						Head:  "silly",
+						Tail:  "bolt",
+						Color: "#654321",
+					},
+				},
+			},
+			Food:    []Coord{{X: 2, Y: 2}},
+			Hazards: []Coord{{X: 8, Y: 8}, {X: 9, Y: 9}},
+		},
+		You: Snake{
+			ID:      "snake-1",
+			Name:    "snake-1-name",
+			Latency: "snake-1-latency",
+			Health:  200,
+			Body:    []Coord{{X: 2, Y: 2}, {X: 2, Y: 3}, {X: 2, Y: 4}},
+			Head:    Coord{X: 2, Y: 2},
+			Length:  3,
+			Shout:   "snake-1-shout",
+			Squad:   "snake-1-squad",
+			Customizations: Customizations{
+				Head:  "silly",
+				Tail:  "bolt",
+				Color: "#654321",
+			},
+		},
+	}
+}
+
+var exampleRulesetSettings = RulesetSettings{
+	FoodSpawnChance:     10,
+	MinimumFood:         20,
+	HazardDamagePerTurn: 30,
+
+	RoyaleSettings: RoyaleSettings{
+		ShrinkEveryNTurns: 40,
+	},
+
+	SquadSettings: SquadSettings{
+		AllowBodyCollisions: true,
+		SharedElimination:   true,
+		SharedHealth:        true,
+		SharedLength:        true,
+	},
+}