add type doc

pallets/authority-members/src/lib.rs

pallets/certification/src/lib.rs

pallets/distance/src/lib.rs

pallets/duniter-account/src/lib.rs

pallets/duniter-wot/src/lib.rs

pallets/identity/src/lib.rs

pallets/membership/src/lib.rs

pallets/offences/src/lib.rs

pallets/oneshot-account/src/lib.rs

pallets/provide-randomness/src/lib.rs

pallets/quota/src/lib.rs

pallets/smith-members/src/lib.rs

pallets/universal-dividend/src/lib.rs

pallets/upgrade-origin/src/lib.rs