- move `Phase` enum out of `PhaseSystem`
- simplify `Phase` enum (for now)
- remove separate components for phases
- fix `start/end..Phase` methods

- create authority package for encapsulation
- enhance phase enum with event suppliers
- use event suppliers to generalize phase transition in PhaseSystem

…mand arguments

The parsing of the in-game console arguments is handled by central `ParameterAdapter`s. Modules can register new adapters to extend the support for custom types.

This adds support for the `Phase` enum to be used in the in-game console.

- replace `PregameEvent` with `OnPreGamePhaseStartedEvent`

- update method in GameEntitySystem that can be called to update stats on-demand

…e team stats

- move commands to GameEntitySystem

- use configurable minTeamSize instead of static value
- use broadcast OnPreGamePhaseStartedEvent instead of GameStartMesssage event

- only in pre-game and countdown phases
- only if player is neither spectator (white team) nor unassigned

…ase when countdown finished

…self

- create PlayerExitedArenaEvent
- on arena exit remove AllowShopScreenComponent (players only need the shop in-game)
- move check for condition changes that trigger a phase change into LASSystem
- switch player to white team instead of removing LASTeam component
- trigger arena exit clean up actions for disconnecting clients before they are disconnected (requires MovingBlocks/Terasology#5077)

…rena