Introduce some new standard library modules

modules/math/src/main/kotlin/io/smnp/ext/MathModule.kt

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+package io.smnp.ext
+
+import io.smnp.ext.function.ModuloFunction
+import io.smnp.ext.function.RangeFunction
+import org.pf4j.Extension
+
+@Extension
+class MathModule : NativeModuleProvider("smnp.math") {
+   override fun functions() = listOf(ModuloFunction(), RangeFunction())
+}

modules/math/src/main/kotlin/io/smnp/ext/function/ModuloFunction.kt

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+package io.smnp.ext.function
+
+import io.smnp.callable.function.Function
+import io.smnp.callable.function.FunctionDefinitionTool
+import io.smnp.callable.signature.Signature.Companion.simple
+import io.smnp.type.enumeration.DataType.INT
+import io.smnp.type.matcher.Matcher.Companion.ofType
+import io.smnp.type.model.Value
+
+class ModuloFunction : Function("mod") {
+   override fun define(new: FunctionDefinitionTool) {
+      new function simple(ofType(INT), ofType(INT)) body { _, (a, b) ->
+         Value.int(a.value as Int % b.value as Int)
+      }
+   }
+}

modules/math/src/main/kotlin/io/smnp/ext/function/RangeFunction.kt

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+package io.smnp.ext.function
+
+import io.smnp.callable.function.Function
+import io.smnp.callable.function.FunctionDefinitionTool
+import io.smnp.callable.signature.Signature.Companion.simple
+import io.smnp.type.enumeration.DataType.INT
+import io.smnp.type.matcher.Matcher.Companion.ofType
+import io.smnp.type.model.Value
+
+class RangeFunction : Function("range") {
+   override fun define(new: FunctionDefinitionTool) {
+      new function simple(ofType(INT), ofType(INT)) body { _, (begin, end) ->
+         Value.list(IntRange(begin.value as Int, end.value as Int).map { Value.int(it) })
+      }
+   }
+}