[stdlib-mpp] initial approach in a separate project

- produce similar jvm, js and common jars
- try default publishing

#KT-56106

settings.gradle

@@ -587,6 +587,7 @@ if (buildProperties.inJpsBuildIdeaSync) {
             ":kotlin-dom-api-compat",
             ":kotlin-stdlib-js-ir-minimal-for-test",
             ":kotlin-stdlib-wasm",
+            ":kotlin-stdlib-mpp",
             ":kotlin-stdlib-jdk7",
             ":kotlin-stdlib-jdk8",
             ":kotlin-stdlib:samples",
@@ -612,6 +613,7 @@ if (buildProperties.inJpsBuildIdeaSync) {
     project(':kotlin-stdlib-js-ir-minimal-for-test').projectDir = "$rootDir/libraries/stdlib/js-ir-minimal-for-test" as File
     project(':kotlin-stdlib-jdk7').projectDir = "$rootDir/libraries/stdlib/jdk7" as File
     project(':kotlin-stdlib-jdk8').projectDir = "$rootDir/libraries/stdlib/jdk8" as File
+    project(':kotlin-stdlib-mpp').projectDir = "$rootDir/libraries/stdlib" as File
     project(':kotlin-stdlib:samples').projectDir = "$rootDir/libraries/stdlib/samples" as File
     project(":kotlin-stdlib-jvm-minimal-for-test").projectDir = "$rootDir/libraries/stdlib/jvm-minimal-for-test" as File