Add better docs of the TS SDK v1.0.0-alpha1 (after the refactoring).

[MHHukiewitz]

Very similar to the existing Python SDK docs.

[github-actions[bot]]

Deployed (not pinned) on:

• https://ipfs-2.aleph.im/ipfs/QmPnzcx52N49GRUQ8DjevzKYWAJCumutHLer6g2CQt9Fzz
• https://beta.docs.aleph.im/ (may be overriden anytime by another PR)

[github-actions[bot]]

Deployed (not pinned) on:

• https://ipfs-2.aleph.im/ipfs/QmZGHEuBhEaEsRSdnBY5x2kw2e2ctA8VdWEUapeAzGoiN6
• https://beta.docs.aleph.im/ (may be overriden anytime by another PR)