* removed the rest of the magic number errors from d2game
* hotfix for bug i added in map engine test
* removed all TODO's in project, made issues on github for each one
* Casting a skill now plays the corresponding overlay(if any).
* Prevent a crash caused by nil pointer in HeroSkill deserialization, happening when
unmarshalling HeroSkill from packets as a remote client.
* Add PlayerAnimationModeNone to handle some of the Skills(e.g.
Paladin auras) having "" as animation mode.
* Joining a game as remote client now waits for map generation to finish
before rendering map or processing map entities. This is temporary hack to prevent the game from
crashing due to concurrent map read & write exception.
* Send CastSkill packet to other clients.
Co-authored-by: Presiyan Ivanov <presiyan-ivanov@users.noreply.github.com>
