✨ Add ic-merge command

Still needs some work, like saving to a new file, but works well so far.

infinitecraft/game.go

@@ -0,0 +1,10 @@
+package infinitecraft
+
+type Game struct {
+	Name      string `json:"name"`
+	Version   string `json:"version"`
+	Created   uint64 `json:"created"`
+	Updated   uint64 `json:"updated"`
+	Instances []any  `json:"instances" db:"-"`
+	Items     []Item `json:"items" db:"-"`
+}