Fix the generation of the API doc and publish it online

[NicNomadic]

The API doc, which was available in the upstream project at https://typedocs.walletbeacon.io is generated in principle by doing npm ci; npx typedoc, but the latter command fails with the following error:

packages/octez.connect-ui/tests/hooks/use-substrate-wallets.tsx:2:33 - error TS2307: Cannot find module '../../src/ui/alert/hooks/useSubstrateWallets' or its corresponding type declarations.

2 import useSubstrateWallets from '../../src/ui/alert/hooks/useSubstrateWallets'

Indeed, file packages/beacon-ui/src/ui/alert/hooks/useSubstrateWallets.tsx has been removed in this repo (while in the upstream repo it existed: https://github.com/airgap-it/beacon-sdk/blob/master/packages/beacon-ui/src/ui/alert/hooks/useSubstrateWallets.tsx).

[NicNomadic]

Once fixed, the API doc should probably be published automatically in CI to some URL such as https://typedocs.octez-connect.tezos.com.