AlwaysTrue and AlwaysFalse boolean providers

src/main/kotlin/ru/dbotthepony/mc/otm/data/world/BooleanProvider.kt

@@ -92,6 +92,36 @@ interface BooleanProvider {
 		}
 	}
 
+	object AlwaysTrue : BooleanProvider, Instance, Type<AlwaysTrue> {
+		override fun instance(): Instance {
+			return this
+		}
+
+		override fun sample(random: RandomSource): Boolean {
+			return true
+		}
+
+		override val type: Type<*>
+			get() = this
+
+		override val codec: MapCodec<AlwaysTrue> = MapCodec.unit(this)
+	}
+
+	object AlwaysFalse : BooleanProvider, Instance, Type<AlwaysFalse> {
+		override fun instance(): Instance {
+			return this
+		}
+
+		override fun sample(random: RandomSource): Boolean {
+			return false
+		}
+
+		override val type: Type<*>
+			get() = this
+
+		override val codec: MapCodec<AlwaysFalse> = MapCodec.unit(this)
+	}
+
 	companion object {
 		private val registryHolder = RegistryDelegate<Type<*>>("boolean_provider") {
 			defaultKey(ResourceLocation(OverdriveThatMatters.MOD_ID, "zero"))
@@ -105,6 +135,8 @@ interface BooleanProvider {
 		init {
 			registrar.register("unbiased") { Unbiased.Companion }
 			registrar.register("linear_bias") { BiasedLinear.Companion }
+			registrar.register("true") { AlwaysTrue }
+			registrar.register("false") { AlwaysFalse }
 		}
 
 		val CODEC: Codec<BooleanProvider> by lazy {