Rebustron

Hi! I updated outdated documentation links in `README.md` to point to the correct pages.

Hi! I fixed multiple broken links in `README.md` and `setup_mesh.md` that were either missing proper URL formatting or incorrect paths.

## Description Hi! I fixes dead links (404 errors) in the documentation files. The outdated links have been updated to point to the correct and current locations in the documentation....

A typo in README.md has been fixed: the word `merkel` was replaced with the correct `merkle` in the description of the hashing process.