set up samples subproject

Author: adamint

samples/build.gradle

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+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.3.61'
+}
+
+group 'com.adamratzman'
+version '3.0.0'
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    implementation "com.adamratzman:spotify-api-kotlin:3.0.0"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}

samples/settings.gradle

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+enableFeaturePreview('GRADLE_METADATA')
+
+rootProject.name = 'samples'
+

samples/src/main/kotlin/public/BrowseApiSample.kt

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+package public
+
+import com.adamratzman.spotify.spotifyAppApi
+
+fun main() {
+    val api = spotifyAppApi {
+        credentials {
+        }
+    }
+}