Add more docs/articles to explain concepts of network, worker and other items

[pseudoyu]

What feature is it?

1. Explain what a network and a dApp (worker) are.
2. Describe the differences between various types of workers and how they operate.
3. Discuss the pros and cons of enabling workers.

What problem does this feature solve?

Node operators may be confused about networks, workers.

Additional description

No response

This is not a duplicated feature request or new worker proposal

• I have searched existing issues to ensure this feature has not already been requested and this is not a New Worker.