add js as target for shared code

build.gradle

@@ -97,7 +97,6 @@ if (propFile.canRead()) {
     }
 } else {
     println 'signing.properties not found'
-    android.buildTypes.release.signingConfig = null
 }
 
 detekt {

shared/build.gradle.kts

@@ -17,6 +17,12 @@ kotlin {
     android()
     ios()
 
+    js(IR) {
+        browser()
+        nodejs()
+        binaries.library()
+    }
+
     sourceSets {
         val commonMain by getting {
             dependencies {

shared/src/jsMain/kotlin/com/habitrpg/shared/habitica/Logger.js.kt

@@ -0,0 +1,30 @@
+@file:OptIn(ExperimentalJsExport::class)
+
+package com.habitrpg.shared.habitica
+
+@JsExport
+actual class PlatformLogger actual constructor() {
+    actual val enabled: Boolean
+        get() = true
+
+    actual fun logDebug(tag: String, message: String) {
+        console.log("[🥦] $tag: $message")
+    }
+
+    actual fun logInfo(tag: String, message: String) {
+        console.log("[🍋] $tag: $message")
+    }
+
+    actual fun logWarning(tag: String, message: String) {
+        console.log("[🍊] $tag: $message")
+    }
+
+    actual fun logError(tag: String, message: String) {
+        console.log("[🍎] $tag: $message")
+    }
+
+    @JsName("logErrorException")
+    actual fun logError(tag: String, message: String, exception: Throwable) {
+        console.log("[🍎] $tag: $message\n${exception}")
+    }
+}

shared/src/jsMain/kotlin/com/habitrpg/shared/habitica/Platform.js.kt

@@ -0,0 +1,8 @@
+package com.habitrpg.shared.habitica
+
+actual class Platform actual constructor() {
+    actual val platform: String
+        get() = "JS!"
+}
+
+actual interface HParcelable