[DNM] Improved antagonist managing tools for admins. (#10046)

* Improved Antagonist Managing tools for Admins. Part one.

Adding custom objectives, objectives viewer, adding new objectives to player. Moving SpawnedAntag to MonoBehaviour and attaching to Mind.

* Update ObjectiveManagerPage.cs

* Update

* Codacy fix

* Codacy fix

* Codacy fix

* Adding Ghost roles management, teams and some fixes

* Codacy fix

* Update StationObjectiveManager.cs

* Some fixes

* Update ObjectiveAttributesEntry.cs

* Fixes

* Fixes

* Update Objective.cs

* Codacy fix

* Update GhostRoleWindowEntry.cs

* Fix

* Codacy fix

* Codacy fix

* Fix

* Fix