Feat: CLI build command (WIP)

[brmassa]

#151

Build your app using the command line prowl build --project <PATH>. It will invoke the build pipeline.

Relevant changes:

• Program.cs: BuildCommand to prepare and invoke the build pipeline
• ConsoleWindown and Debug: allowing colored messages on build
• ScriptableSingleton.cs: allow to parse FilePathAttribute.Location.EditorSetting when not using the Editor
• Miscelaneous code style changes

[brmassa]

Currently, is failing to load the Scenes from BuildProjectSetting.Instance.Scenes. It tries to call the AssetRef, them try to ready it's .Res, which does not have GUID so it instanciate an empty Scene.

the most important method of this MR is Program.BuildCommand