Simple Project Documentation with MkDocs, PlantUML, and PlantUML-C4 Integration

A practical guide to setting up project documentation using MkDocs with PlantUML, C4-PlantUML architecture diagrams, and icon sprites, all managed via Nix for reproducible dependency management. Covers integrating MkDocs-Material theme, PlantUML-Markdown plugin, and C4-PlantUML library, plus automated markdown linting and spell checking via pre-commit hooks. The Nix-based setup ensures consistent tooling across developer machines and CI/CD pipelines without manual installation steps.