Fix: Two page were the same in the documentation Usage page and Documentation page were the same in tools/aleph-client

[Antonyjin]

Solution: Deleting documentation.md and keep the usage.md. Change the redirect to documentation.md to usage.md

[github-actions[bot]]

Deployed (not pinned) on:

• https://ipfs-2.aleph.im/ipfs/QmY5NZqrY8paHVk5JhiGc2inguSTB4j1KAC1X3rkGEfeFz
• https://beta.docs.aleph.im/ (may be overriden anytime by another PR)