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

pkg/bot/inventory.go

@@ -0,0 +1,23 @@
+package bot
+
+import (
+	"git.konjactw.dev/patyhank/minego/pkg/protocol/slot"
+	"github.com/Tnze/go-mc/level/item"
+)
+
+type Container interface {
+	GetSlot(index int) slot.Slot
+	Slots() []slot.Slot
+	SlotCount() int
+	FindEmpty() int16
+	FindItem(itemID item.ID) int16
+	Click(slot int16, mode int32, button int32) error
+}
+
+type InventoryHandler interface {
+	Inventory() Container
+	Container() Container
+	CurrentContainerID() int32
+	Click(container int32, slot int16, mode int32, button int32) error
+	Close()
+}