BASH: Define common Exit Codes (E_SUCCESS and E_FAILURE) to use throughout the 'mx-dot-files' in '!base.system.bash'
BASH: Implement 'is_command()', 'is_function()' and 'is_user_root()' as <Base Functions> in '!base.system.bash'
BASH: Revamp the 'Handy Colors' to extend its functionality. Define it into '_hcolors_definition()' in '!base.system.bash'
BASH: Modify 'hcolors()' to demo 'Handy Colors' by directly parsing the function declared in the environment
BASH: Improve the functionalities of the Prompt Statement #1 in 'prompt.system.bash'

* Update PS1 to use the new 'Handy Colors' definitions
* Add fancy chars to the PS1 trying to make it stand out in a so colorful world
* Custom PS1 color according to the current user (root or regular-users)