GameExperience: Timed GameStateComponent

[wail]

High Level
Define a new Timed-Mode GameStateComponent

Technical Overview
The standard UnrealEngine GameFramework classes are not usually used in a modular or composable way. In order to make OpenTournament more extensible, we want to utilize the concept/framework of GameExperiences. A GameExperience is a concept that encapsulates everything about a Mode, from the rules of the mode, the HUD elements of the mode, even the characters+charactercomponents in the mode.

Utilizing GameExperiences we compose an 'Experience' from various single-purpose components. Assembling various components together can easily recreate classic modes as Experiences, but also gives us flexibility to rapidly construct new Experiences without additional engineering.

Design Discussion
Do we actually want a time-based GameStateComponent? Time-limit (or lack thereof) might be one of the few things we should handle natively in the GameMode class. However, not all modes are necessarily time-limited or need certain elements (e.g. visible timer), so using a GSC has some purpose to it as well.

Technical Details & Acceptance Criteria
We define a Time Based GSC.

• Define a Configurable TimeLimit
• Define a Configurable OverTime/ExtendedTime if game resolution is not reached in regulation time (might also be another component - discuss?)
• Define configurable X TimeRemaining messaging
• GameStateComponent communicates State to other components & UI elements utilizing GameplayMessagingSubsystem