Realm-cocoa: Provide API docs in Dash (docset) format.

[hungri-yeti]

If possible, please provide the API docs in Dash docset format. Information regarding the conversion can be found at https://kapeli.com/docsets.

Thank you.

[jpsim]

You can install Realm's docs in Dash by clicking the "Install in Dash" link in the upper right corner of our API docs:

• Objective-C: https://realm.io/docs/objc/latest/api/
• Swift: https://realm.io/docs/swift/latest/api/