[FEATURE] Error Management

[BoxBoxJason]

Error Management

Definition

There is currently no distinction made between errors (an error is returned whether the project creation failed or simply the avatar creation failed). This needs to be refined to return a valid exit code at the end of the execution

Definition of done

The exit code reflects the real status of execution:

• 0 for no errors
• 1 for blocking errors
• 2 for non blocking errors