Add docc with intro and example

Author: juri

Sources/ProvisionInfoKit/Documentation.docc/Documentation.md

@@ -0,0 +1,13 @@
+# ``ProvisionInfoKit``
+
+ProvisionInfoKit is a Swift library for parsing provisioning profiles. It gives you all the metadata fields,
+entitlements, device list and certificates in the profile.
+
+
+
+## Usage
+
+```swift
+let data = try Data(contentsOf: url)
+let profile = try Profile(data: data)
+```