Added and configured iOS Extension project with ExtensionPreprocessingJS for webpage analysis.

src/iOS.Extension/extension.js

@@ -0,0 +1,16 @@
+var BitwardenExtension = function () { };
+
+BitwardenExtension.prototype = {
+    run: function (arguments) {
+        var args = {
+            content: document.body.innerHTML,
+            uri: document.baseURI
+        };
+        arguments.completionFunction(args);
+    },
+    finalize: function (arguments) {
+        alert('finalize');
+    }
+};
+
+var ExtensionPreprocessingJS = new BitwardenExtension;