Add shared script instances support, fix and refactor evaluation accordingly

also fix arguments order in the evaluator

libraries/scripting/common/src/kotlin/script/experimental/api/scriptEvaluation.kt

@@ -7,6 +7,7 @@
 
 package kotlin.script.experimental.api
 
+import kotlin.reflect.KClass
 import kotlin.script.experimental.util.PropertiesCollection
 
 interface ScriptEvaluationConfigurationKeys
@@ -46,11 +47,27 @@ val ScriptEvaluationConfigurationKeys.providedProperties by PropertiesCollection
  */
 val ScriptEvaluationConfigurationKeys.constructorArgs by PropertiesCollection.key<List<Any?>>()
 
+/**
+ * A map that is used to store evaluated script instances; if provided - the evaluator will try to get imported script from the map and
+ * only create/evaluate instances if not found, and evaluator will put newly created instances into the map
+ * This allows to have a single instance of the script if it is imported several times via different import paths.
+ */
+val ScriptEvaluationConfigurationKeys.scriptsInstancesSharingMap by PropertiesCollection.key<MutableMap<KClass<*>, Any>>()
+
+/**
+ * A helper to enable scriptsInstancesSharingMap with default implementation
+ */
+fun ScriptEvaluationConfiguration.Builder.enableScriptsInstancesSharing() {
+    this {
+        scriptsInstancesSharingMap(HashMap())
+    }
+}
+
 /**
  * The script evaluation result value
  */
 sealed class ResultValue {
-    class Value(val name: String, val value: Any?, val type: String) : ResultValue() {
+    class Value(val name: String, val value: Any?, val type: String, val scriptInstance: Any) : ResultValue() {
         override fun toString(): String = "$name: $type = $value"
     }
 

libraries/scripting/common/src/kotlin/script/experimental/host/scriptHostUtil.kt

@@ -66,15 +66,14 @@ fun File.toScriptSource(): SourceCode = FileScriptSource(this)
 /**
  * The implementation of the ScriptSource for a script in a String
  */
-open class StringScriptSource(val source: String) : SourceCode {
+open class StringScriptSource(val source: String, override val name: String? = null) : SourceCode {
 
     override val text: String get() = source
 
-    override val name: String? = null
     override val locationId: String? = null
 }
 
 /**
  * Converts the String into the SourceCode
  */
-fun String.toScriptSource(): SourceCode = StringScriptSource(this)
+fun String.toScriptSource(name: String? = null): SourceCode = StringScriptSource(this, name)