CB-5124 - Remove splashscreen config.xml values from iOS Configuration Docs, move to plugin docs

docs/config.md

@@ -0,0 +1,53 @@
+---
+license: Licensed to the Apache Software Foundation (ASF) under one
+         or more contributor license agreements.  See the NOTICE file
+         distributed with this work for additional information
+         regarding copyright ownership.  The ASF licenses this file
+         to you under the Apache License, Version 2.0 (the
+         "License"); you may not use this file except in compliance
+         with the License.  You may obtain a copy of the License at
+         
+           http://www.apache.org/licenses/LICENSE-2.0
+         
+         Unless required by applicable law or agreed to in writing,
+         software distributed under the License is distributed on an
+         "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+         KIND, either express or implied.  See the License for the
+         specific language governing permissions and limitations
+         under the License.
+---
+
+# iOS Configuration
+
+The `config.xml` file controls an app's basic settings that apply
+across each application and CordovaWebView instance. This section
+details preferences that only apply to iOS builds. See The config.xml
+File for information on global configuration options.
+
+- `FadeSplashScreen` (boolean, defaults to `true`): Set to `false` to
+  prevent the splash screen from fading in and out when its display
+  state changes.
+
+        <preference name="FadeSplashScreen" value="false"/>
+
+- `FadeSplashScreenDuration` (float, defaults to `2`): Specifies the
+  number of seconds for the splash screen fade effect to execute.
+
+        <preference name="FadeSplashScreenDuration" value="4"/>
+
+- `ShowSplashScreenSpinner` (boolean, defaults to `true`): Set to `false`
+  to hide the splash-screen spinner.
+
+        <preference name="ShowSplashScreenSpinner" value="false"/>
+
+- `KeyboardDisplayRequiresUserAction` (boolean, defaults to `true`):
+  Set to `false` to allow the keyboard to appear when calling
+  `focus()` on form inputs.
+
+        <preference name="KeyboardDisplayRequiresUserAction" value="false"/>
+
+- `AutoHideSplashScreen` (boolean, defaults to `true`):
+   Set to `false` to control when the splashscreen is hidden through the plugin's JavaScript API.
+
+        <preference name="AutoHideSplashScreen" value="false"/>
+