Species.legendaries and Species.ultrabeasts always return an empty array

[Sayakie]

Reading Species#legendaries and Species#ultrabests will always return an empty array that its length is 0.

Hakase/src/entity/Species.mts

Lines 905 to 906 in aa66719

	protected static readonly legendaries: Species[] = []
	protected static readonly ultrabeasts: Species[] = []

This is caused by SpeciesImpl static initialization step just concats an array, and not set again.

Hakase/src/private/entity/SpeciesImpl.mts

Lines 75 to 176 in aa66719

	static {
	Species.legendaries.concat([
	Species.MissingNo,
	/** Generation 1 */
	Species.Articuno,
	Species.Zapdos,
	Species.Moltres,
	Species.Mewtwo,
	Species.Mew,
	/** Generation 2 */
	Species.Raikou,
	Species.Entei,
	Species.Suicune,
	Species.Lugia,
	Species.Hooh,
	Species.Celebi,
	/** Generation 3 */
	Species.Regirock,
	Species.Regice,
	Species.Registeel,
	Species.Latias,
	Species.Latios,
	Species.Kyogre,
	Species.Groudon,
	Species.Rayquaza,
	Species.Jirachi,
	/** Generation 4 */
	Species.Uxie,
	Species.Mesprit,
	Species.Azelf,
	Species.Dialga,
	Species.Palkia,
	Species.Heatran,
	Species.Regigigas,
	Species.Giratina,
	/** Generation 5 */
	Species.Cobalion,
	Species.Terrakion,
	Species.Virizion,
	Species.Tornadus,
	Species.Thundurus,
	Species.Landorus,
	/** Generation 6 */
	Species.Xerneas,
	Species.Yveltal,
	Species.Zygarde,
	Species.Diancie,
	Species.Hoopa,
	Species.Volcanion,
	/** Generation 7 */
	Species.TypeNull,
	Species.Silvally,
	Species.TapuKoko,
	Species.TapuLele,
	Species.TapuBulu,
	Species.TapuFini,
	Species.Cosmog,
	Species.Cosmoem,
	Species.Solgaleo,
	Species.Lunala,
	Species.Necrozma,
	Species.Marshadow,
	Species.Magearna,
	Species.Zeraora,
	Species.Meltan,
	Species.Melmetal,
	/** Generation 8 */
	Species.Zacian,
	Species.Zamazenta,
	Species.Eternatus,
	Species.Kubfu,
	Species.Urshifu,
	Species.Zarude,
	Species.Regieleki,
	Species.Regidrago,
	Species.Glastrier,
	Species.Spectrier,
	Species.Calyrex
	])
	Species.ultrabeasts.concat([
	Species.Blacephalon,
	Species.Buzzwole,
	Species.Celesteela,
	Species.Guzzlord,
	Species.Poipole,
	Species.Naganadel,
	Species.Nihilego,
	Species.Pheromosa,
	Species.Kartana,
	Species.Stakataka,
	Species.Xurkitree
	])
	}

[Sayakie]

And each species are unique and singleton, so look good to set their type to Set<Species>. But we also needs to notice about the type would be changed.