add player package with key client-side player functionality, update protocol codecs, and refactor metadata definitions and slot usage

pkg/protocol/packet/game/client/level_chunk_with_light.go

@@ -1,12 +1,45 @@
 package client
 
-import "github.com/Tnze/go-mc/level"
+import (
+	"io"
+
+	"github.com/Tnze/go-mc/level"
+)
 
 var _ ClientboundPacket = (*LevelChunkWithLight)(nil)
 
-//codec:gen
 type LevelChunkWithLight struct {
-	X    int32
-	Z    int32
-	Data level.Chunk
+	Pos  level.ChunkPos
+	Data *level.Chunk
+}
+
+func (c *LevelChunkWithLight) ReadFrom(r io.Reader) (n int64, err error) {
+	temp, err := c.Pos.ReadFrom(r)
+	if err != nil {
+		return temp, err
+	}
+	c.Data = level.EmptyChunk(36)
+
+	temp, err = (c.Data).ReadFrom(r)
+	n += temp
+	if err != nil {
+		return n, err
+	}
+	return n, err
+}
+
+func (c LevelChunkWithLight) WriteTo(w io.Writer) (n int64, err error) {
+	var temp int64
+	temp, err = c.Pos.WriteTo(w)
+	n += temp
+	if err != nil {
+		return n, err
+	}
+
+	temp, err = (*level.Chunk)(c.Data).WriteTo(w)
+	n += temp
+	if err != nil {
+		return n, err
+	}
+	return n, err
 }