[iOS] Extend plugins documentation

(cherry picked from commit ca1cbee5ea)

tutorials/platform/ios/ios_plugin.rst

@@ -95,7 +95,16 @@ To build an iOS plugin:
             linker_flags=["-ObjC"]
 
             [plist]
-            PlistKey="Some Info.plist key you might need"
+            PlistKeyWithDefaultType="Some Info.plist key you might need"
+            StringPlistKey:string="String value"
+            IntegerPlistKey:integer=42
+            BooleanPlistKey:boolean=true
+            RawPlistKey:raw="
+            <array>
+                <string>UIInterfaceOrientationPortrait</string>
+            </array>
+            "
+            StringPlistKeyToInput:string_input="Type something"
 
         The ``config`` section and fields are required and defined as follow:
 
@@ -124,4 +133,10 @@ To build an iOS plugin:
 
                 -   **linker_flags**: contains a list of linker flags to add to the Xcode project when exporting the plugin.
 
-            -   **plist**: should have keys and values that should be present in ``Info.plist`` file following pattern: ``KeyName="key value"``
+            -   **plist**: should have keys and values that should be present in ``Info.plist`` file.
+
+                -   Each line should follow pattern: ``KeyName:KeyType=KeyValue``
+                -   Supported values for ``KeyType`` are ``string``, ``integer``, ``boolean``, ``raw``, ``string_input``
+                -   If no type is used (e.g.: ``KeyName="KeyValue"``) ``string`` type will be used.
+                -   If ``raw`` type is used value for coresponding key will be stored in ``Info.plist`` as is.
+                -   If ``string_input`` type is used you will be able to modify value in Export window.

tutorials/platform/ios/plugins_for_ios.rst

@@ -3,11 +3,13 @@
 Plugins for iOS
 ===============
 
-At the moment Godot provides StoreKit, GameCenter, iCloud services plugins.
+Godot provides StoreKit, GameCenter, iCloud services and other plugins.
 They are using same model of asynchronous calls explained below.
 
 ARKit and Camera access are also provided as plugins.
 
+Latest updates, documentation and source code can be found at `Godot iOS plugins repository <https://github.com/godotengine/godot-ios-plugins>`_ 
+
 Accessing plugin singletons
 ---------------------------