go through a ton of pedantic clippy lints

Cargo.toml

src/api/appservice_server.rs

src/api/client_server/account.rs

src/api/client_server/alias.rs

src/api/client_server/backup.rs

src/api/client_server/context.rs

src/api/client_server/device.rs

src/api/client_server/keys.rs

src/api/client_server/media.rs

src/api/client_server/membership.rs

src/api/client_server/message.rs

src/api/client_server/profile.rs

src/api/client_server/push.rs

src/api/client_server/read_marker.rs

src/api/client_server/report.rs

src/api/client_server/room.rs

src/api/client_server/search.rs

src/api/client_server/session.rs

src/api/client_server/state.rs

src/api/client_server/sync.rs