Add description to README, remove google repo

early-prototypes/README.md

@@ -2,4 +2,5 @@
 
 ## [Android](android/README.md)
 ## [Java projects](single-target/README.md)
+## [Kotlin Multiplatform projects](kotlin-multiplatform/README.md)
 ## [Settings](workspace-settings/README.md)

early-prototypes/kotlin-multiplatform/README.md

@@ -1,3 +1,28 @@
+# Declarative Kotlin Multiplatform projects
+
+This explores how to use a simpler, more static DSL to configure applications and libraries written for KMP.
+
+All configuration is moved under a new `androidApplication` block.
+This example only demonstrates an application, but the same ideas apply to libraries.
+
+## [Example](testbed/build.gradle.kts)
+
+The `testbed` subproject uses the new DSL.
+
+The new DSL demonstrates several ideas:
+- `platforms` is a list property in the `kmpApplication` block that specifies the multiplatform targets built by this project.
+- Common top-level properties that apply to all targets (like the `languageVersion` of Kotlin used, and the whether or not to `publishSources` for the project) are backed by `Property` instances and available directly in the `kmpApplication` block.
+There is code in the `Greeter.kt` file in `commonMain` that requires Kotlin 1.9 to compile.
+- `dependencies {}` in the `kmpApplication` block allows for declaring common dependencies usable by all targets, in the same way the `commonMain` KMP sourceSet would. 
+- `targets {}` allows for configuring specific KMP platform variants.
+Static extension methods are provided for each platform (only `jvm` and `js` implemented so far) to allow for configuring platform-specific dependencies with IDE type assistance.
+- Publishing the project is configured to use a local Maven repo under `build/repo` using the `publishing` block provided by the `maven-publish` plugin, to demonstrate the results of publishing the project with and without sources.
+
+### Running the project
+
+All tasks below should be executed from the `testbed` directory.
+Running the project requires running Gradle with Java 17.
+
 To run (on the JVM):
 ```shell
  ./gradlew jvmRun -DmainClass=GreeterKt --quiet

early-prototypes/kotlin-multiplatform/testbed/build.gradle.kts

@@ -6,7 +6,6 @@ plugins {
 
 repositories {
  mavenCentral()
- google()
 }
 
 kmpApplication {