Implement import test, fix import support in compiler and evaluator

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

@@ -234,6 +234,9 @@ interface CompiledScript<out ScriptBase : Any> {
      */
     suspend fun getClass(scriptEvaluationConfiguration: ScriptEvaluationConfiguration?): ResultWithDiagnostics<KClass<*>>
 
-    val importedScripts: List<CompiledScript<*>>?
-        get() = null
+    /**
+     * The scripts compiled along with this one in one module, imported or otherwise included into compilation
+     */
+    val otherScripts: List<CompiledScript<*>>
+        get() = emptyList()
 }

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

@@ -42,9 +42,9 @@ fun getMergedScriptText(script: SourceCode, configuration: ScriptCompilationConf
 /**
  * The implementation of the SourceCode for a script located in a file
  */
-open class FileScriptSource(val file: File) : ExternalSourceCode {
+open class FileScriptSource(val file: File, private val preloadedText: String? = null) : ExternalSourceCode {
     override val externalLocation: URL get() = file.toURI().toURL()
-    override val text: String by lazy { file.readText() }
+    override val text: String by lazy { preloadedText ?: file.readText() }
 }
 
 /**