Introduce core components for "Escape From Teacher" game: server, client, physics, asset system, and protocol definitions. Add Docker-Compose setup for Redis and NATS infrastructure.

pkg/game/data.go

@@ -0,0 +1,86 @@
+package game
+
+import "image/color"
+
+type Vec2 struct {
+	X, Y float64 `json:"x,y"`
+}
+type Rect struct {
+	OffsetX, OffsetY, W, H float64
+	Type                   string
+} // Type hinzugefügt aus letztem Schritt
+type HexColor struct {
+	R, G, B, A uint8 `json:"r,g,b,a"`
+}
+
+func (h HexColor) ToRGBA() color.RGBA {
+	if h.A == 0 {
+		return color.RGBA{h.R, h.G, h.B, 255}
+	}
+	return color.RGBA{h.R, h.G, h.B, h.A}
+}
+
+// --- ASSETS & CHUNKS (Bleiben gleich) ---
+type AssetDefinition struct {
+	ID, Type, Filename                               string
+	Scale, ProcWidth, ProcHeight, DrawOffX, DrawOffY float64
+	Color                                            HexColor
+	Hitbox                                           Rect
+}
+type AssetManifest struct {
+	Assets map[string]AssetDefinition `json:"assets"`
+}
+type LevelObject struct {
+	AssetID string
+	X, Y    float64
+}
+type Chunk struct {
+	ID      string
+	Width   int
+	Objects []LevelObject
+}
+type ActiveChunk struct {
+	ChunkID string
+	X       float64
+}
+
+// --- NETZWERK & GAMEPLAY ---
+
+// Login Request (Client -> Server beim Verbinden)
+type LoginPayload struct {
+	Action string `json:"action"`  // "CREATE" oder "JOIN"
+	RoomID string `json:"room_id"` // Leer bei CREATE, Code bei JOIN
+	Name   string `json:"name"`    // Spielername
+}
+
+// Input vom Spieler während des Spiels
+type ClientInput struct {
+	Type     string `json:"type"` // "JUMP", "START"
+	RoomID   string `json:"room_id"`
+	PlayerID string `json:"player_id"`
+}
+
+type JoinRequest struct {
+	Name   string `json:"name"`
+	RoomID string `json:"room_id"`
+}
+
+type PlayerState struct {
+	ID       string  `json:"id"`
+	Name     string  `json:"name"`
+	X        float64 `json:"x"`
+	Y        float64 `json:"y"`
+	State    string  `json:"state"`
+	OnGround bool    `json:"on_ground"`
+}
+
+type GameState struct {
+	RoomID      string                 `json:"room_id"`
+	Players     map[string]PlayerState `json:"players"`
+	Status      string                 `json:"status"`
+	TimeLeft    int                    `json:"time_left"`
+	WorldChunks []ActiveChunk          `json:"world_chunks"`
+	HostID      string                 `json:"host_id"`
+
+	ScrollX float64 `json:"scroll_x"`
+}