docs(API.md, CONFIG.md, DOCKER.md, MAKE.md, README.md): streamline documentation and remove deprecated content

Simplify the API documentation by focusing on core features and removing redundant sections. The CONFIG.md now emphasizes automatic configuration processing during container builds, eliminating the need for manual script execution. The DOCKER.md is updated to focus on production considerations, removing advanced topics like Docker Swarm and Kubernetes. The MAKE.md is streamlined to focus on essential commands, removing detailed automation scripts and performance optimization sections. The README.md no longer references the deprecated GAMJA.md, reflecting the removal of the web IRC client documentation.

These changes aim to reduce complexity and improve the maintainability of the documentation by focusing on the most relevant and frequently used features. This helps new users to quickly understand the setup and operation of the system without being overwhelmed by less commonly used features or deprecated content.

Author: kzndotsh