react-native example app port (#223)

* add readme

* react-native example app

* update readme

* add ios-cli dep

* revert package.json change

* update readme

* update readme

* don't auto launch metro

* add react native scripts

* nohoist @react-native-community/**

* update readme

* undo wrong README change

* remove react-native root dep

* copyright headers

* semi-style

* add default gitignore

* finish linting

* remove test for now

* fix typescript errors

* fix linting

* update scripts

* update deps and version

* update readme

* remove accidental dep

* update readme

* bump deps

* update yarn.lock

* actually update yarn.lock

* fix yarn.lock conflicts by updating exampleReactNative deps

packages/exampleReactNative/android/gradle.properties

@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+# Default value: -Xmx10248m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+
+android.useAndroidX=true
+android.enableJetifier=true