- updated Unity version

added documentation for string.Format shortcut

added a shortcut to format a string

- Unity version update

popup package update, and minor updates to the popup script

added type pool to the resource manager

Added documentation for methods

Added getting a random item from an array method

Added a licence

Created UnityPackage for Utils

Added credits for audio

Documenting AudioPlayer

Restructuring folders and some style corrections

LFS initialized

Added AudioPlayer and IsValid() string method