Create a function IsHalal to filter consumables

[todo]

eiko/misc/consumable/consumable.go

Lines 31 to 36 in 3d415fb

	// TODO: Create a function `IsHalal` to filter consumables
	return true
	}
	// IsCasher return true is the consumable is Casher
	func IsCasher(structures.Consumable) bool {

---

This issue was generated by todo based on a TODO comment in 3d415fb when #19 was merged. cc @eiko-team.