Documentation: Enhance README Project Structure Section with ASCII Tree

[d3bvstack]

Overview

Improve the "Project Structure" section in the README by including a detailed ASCII tree diagram that visualizes the directory structure of the project. This will help new contributors and users better understand the layout and organization of the codebase.

Tasks

• Review the current README and the "Project Structure" section.
• Generate a clear, accurate ASCII tree that reflects the current directory and file structure.
• Integrate the ASCII tree into the README, replacing or enhancing the existing section.
• Ensure formatting is consistent and readable both on GitHub and in local editors.

Benefits

• Improved documentation quality.
• Quick overview of codebase organization.

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Example ASCII Tree (for reference only):

vmctl/
├── cmd/
│   └── ...
├── internal/
│   └── ...
├── api/
│   └── ...
└── README.md