Log out (#174)

* Expose logout method from SDK

* Use logout from SDK, refactor logging out states

* Add some strings

* Introduce `initialDisplayName` on `UIDevice`

* Implement soft logout screen

* Add `softLogout` test screen identifier

* Add new fields into the client proxy and implement new delegate methods

* Add new fields into the user session and observe new client callbacks

* Implement updated login method

* Add remote logout state and event into the state machine

* Implement refreshing restore token on `UserSessionStore`

* Update app coordinator with new states and display soft logout screen when appropriate

* Add reference screenshots for soft logout screen

* Disable auto requesting photos access on screenshot detection

* Make initial device name optional, generate project file

* Add changelog

* Use logout from SDK, refactor logging out states

* Implement soft logout screen

* Implement updated login method

* Make initial device name optional, generate project file

* Fix renamed event

* Fix logout race

* Remove redundant strings

* Reuse existing strings

* Confirm clear all data

* Expose logout method from SDK

* Use logout from SDK, refactor logging out states

* Add some strings

* Introduce `initialDisplayName` on `UIDevice`

* Implement soft logout screen

* Add `softLogout` test screen identifier

* Add new fields into the client proxy and implement new delegate methods

* Add new fields into the user session and observe new client callbacks

* Implement updated login method

* Add remote logout state and event into the state machine

* Implement refreshing restore token on `UserSessionStore`

* Update app coordinator with new states and display soft logout screen when appropriate

* Add reference screenshots for soft logout screen

* Disable auto requesting photos access on screenshot detection

* Make initial device name optional, generate project file

* Add changelog

* Use logout from SDK, refactor logging out states

* Implement soft logout screen

* Implement updated login method

* Make initial device name optional, generate project file

* Fix renamed event

* Fix logout race

* Remove redundant strings

* Reuse existing strings

* Confirm clear all data

* Comment out new apis for now

* Make the PR compile

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