Minimal apps branding (#642)

* Add icon/splash - just a quick starting point.
* Call the apps CreateAI - micro:bit CreateAI doesn't fit - on iPad the space is smooshed and on Android phone I just see "micro:bit..."
* Assets cap plugin pulls in prettier xml formatting so ignore the existing SVGs in the app

Author: microbit-matt-hillsdon

.prettierignore

@@ -1,2 +1,3 @@
 src/translations.ts
 src/messages/
+src/images/

android/app/src/main/AndroidManifest.xml

@@ -1,37 +1,31 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
-
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-
         <activity
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode|navigation"
             android:name=".MainActivity"
             android:label="@string/title_activity_main"
             android:theme="@style/AppTheme.NoActionBarLaunch"
             android:launchMode="singleTask"
             android:exported="true">
-
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-
         </activity>
 
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.fileprovider"
             android:exported="false"
             android:grantUriPermissions="true">
-            <meta-data
-                android:name="android.support.FILE_PROVIDER_PATHS"
-                android:resource="@xml/file_paths"></meta-data>
+            <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
         </provider>
     </application>