Enemy wave manager - Githubissues

Create a script EnemyWaveOrchestrator that will:

[x] Spawn enemies over time (Currently all enemies spawn at exact same time)
[x] Message jukebox and other systems when all enemies in a wave has died
[x] Pool enemies (Currently we create and destroy which creates heaps of garbage)
[x] Supply references to enemies through the spawn system to save load times

Avokadoen / shipwrecked