rfcs

* fix clippy errors

* add Invalid case in distance status

* fix events pallet-membership

* fix events pallet-certification

* update docs

* update metadata and docs

* refactor errors pallet-distance

* fix distance error naming pallet duniter-wot

* add pallet membership documentation

* refactor acquisition and renewal pallet-membership

* refactor expiration and revokation pallet-membership

* refactor calls pallet-identity

* add pallet standard guidelines

* refactor events struct pallet-membership

* add events pallet-distance

* refactor documentation pallet-quota

* fix pallet-quota features

* refactor documentation pallet-provide-randomness

* refactor documentation pallet-oneshot-account

* refactor documentation pallet-offences

* refactor documentation pallet-membership

* refactor documentation pallet-identity

* refactor documentation pallet-duniter-wot

* refactor documentation pallet-duniter-account

* refactor documentation pallet-distance

* refactor documentation pallet-certification

* refactor documentation pallet-authority-members

* refactor error naming pallet-provide-randomness

* remove unused errors pallet-membership

* remove unused errors pallet-identity

* refactor events and errors pallet-distance

* refactor events and errors pallet-authority-members