Added frontend skeleton

frontend/README.md

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+This is a Kotlin Multiplatform project targeting Web, Desktop.
+
+* `/composeApp` is for code that will be shared across your Compose Multiplatform applications.
+  It contains several subfolders:
+  - `commonMain` is for code that’s common for all targets.
+  - Other folders are for Kotlin code that will be compiled for only the platform indicated in the folder name.
+    For example, if you want to use Apple’s CoreCrypto for the iOS part of your Kotlin app,
+    `iosMain` would be the right folder for such calls.
+
+
+Learn more about [Kotlin Multiplatform](https://www.jetbrains.com/help/kotlin-multiplatform-dev/get-started.html),
+[Compose Multiplatform](https://github.com/JetBrains/compose-multiplatform/#compose-multiplatform),
+[Kotlin/Wasm](https://kotl.in/wasm/)…
+
+We would appreciate your feedback on Compose/Web and Kotlin/Wasm in the public Slack channel [#compose-web](https://slack-chats.kotlinlang.org/c/compose-web).
+If you face any issues, please report them on [GitHub](https://github.com/JetBrains/compose-multiplatform/issues).
+
+You can open the web application by running the `:composeApp:wasmJsBrowserDevelopmentRun` Gradle task.