[Swift Export] initial infrastructure for Swift IR

New modules 'sir', 'sir-passes', and 'sir-analysis-api' were added under
'native:swift' for creating and manipulating Swift IR elements.

* `sir` contains the implementation of Swift IR.
* `sir-analysis-api` contains translation from Analysis API to SIR.
* `sir-passses` contains transformation passes.

This groundwork will allow to progress with the Swift IR.

native/swift/sir-analysis-api/build.gradle.kts

@@ -0,0 +1,20 @@
+plugins {
+    kotlin("jvm")
+}
+
+description = "Build Swift IR from Analysis"
+
+dependencies {
+    compileOnly(kotlinStdlib())
+
+    api(project(":native:swift:sir"))
+    api(project(":analysis:analysis-api"))
+
+    testImplementation(libs.junit4)
+    testImplementation(projectTests(":compiler:tests-common"))
+}
+
+sourceSets {
+    "main" { projectDefault() }
+    "test" { projectDefault() }
+}

native/swift/sir-analysis-api/src/org/jetbrains/kotlin/sir/analysisapi/SirGenerator.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.sir.analysisapi
+
+import org.jetbrains.kotlin.sir.SirElement
+
+/**
+ * A root interface for classes that produce Swift IR elements.
+ */
+interface SirFactory {
+    fun build(): SirElement
+}

native/swift/sir-analysis-api/tests/org/jetbrains/kotlin/sir/analysisapi/FactoryTests.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.sir.analysisapi
+
+import org.jetbrains.kotlin.sir.SirElement
+import org.junit.Test
+import kotlin.test.assertEquals
+
+class FactoryTests {
+    @Test
+    fun smoke() {
+        val expectedString = "Element from factory"
+        val myFactory = object : SirFactory {
+            override fun build(): SirElement {
+                return object : SirElement {
+                    override fun toString(): String {
+                        return expectedString
+                    }
+                }
+            }
+        }
+        val element = myFactory.build()
+        assertEquals(expectedString, element.toString())
+    }
+}