[EPIC:] Refine application configuration

[ByteOtter]

What's this about?

This Epic will provide one place to link several issues.

This Epic is about refining and reworking Nazara's configuration component.

Parts

configuration Module

• [TASK:] Add --write-config flag to overwrite config file #26 - Add --write-config flag to write CLI parameters to config file
• [TASK:] --no-config flag #27 - Add --no-config flag to run simply via CLI parameters
• [TASK:] Avoid panic on empty config file. #29 - Avid panic on empty config file (change behaviour)
• [BUG:] Validation error on empty config file despite cli argument given #38 - Fix config file validation error when cli parameters are provided (Change to warning)

Acceptance criteria

• --write-config Flag exists and works as intended
• --no-config Flag exists and works as intended
• panic behaviour changed in [TASK:] Avoid panic on empty config file. #29
• Validation error changed into validation warning when config parameters provided via cli