feat(cli): log in to AniList and out of it

[noctuum]

benshi login prints the address where AniList gives a token for benshi, reads the pasted token without showing it, and has the daemon check it and keep it in the secret store. benshi logout has the daemon remove it.

• The daemon asks AniList Viewer whose the token is before it writes the token, so a token AniList refuses is not kept. It answers with the name of the account and the exp of the token's claims.
• Request::Login and Request::Logout are answered twice: Ok once the request is read, within the client's 5 s deadline, and then what the request came to. The store may ask the person to unlock it, and the client waits for that answer as long as the daemon takes.
• At a terminal the token is read a byte at a time with echo, line editing and signals off. Ctrl-C and Ctrl-D cancel, and the terminal is set back.
• Token in benshi-core shows none of its text with {:?}. The protocol, the prompt and Http hold the token in it.
• base64, already in the lock through reqwest, reads the claims, and rustix sets the terminal.
• The recorder in benshi-sync reads its token from BENSHI_TOKEN_ANILIST, as tests/login_live.rs does.

The ignored tests/login_live.rs was run once with the test account against AniList and ksecretd of kwallet 6.31.0, with the wallet unlocked: the login and the logout passed. A locked wallet was not tested.

cargo test --workspace passes, 1029 tests.