Update documentation and remove redundant section

[Borda]

This pull request makes documentation improvements to the project structure sections in both AGENTS.md and CLAUDE.md. The most notable change is the formatting update in CLAUDE.md to present the directory structure as a code block, improving readability and consistency.

Documentation formatting improvements:

• Updated the project directory structure in CLAUDE.md to be enclosed in a code block, making it clearer and easier to read. [1] [2]
• Removed the redundant directory structure section from AGENTS.md, likely to avoid duplication and maintain a single source of truth.