refac membership (!215)

* delete notes.txt file

* update notes with links to issues

* update comment according to #159

* doc idtystatus in readme

* update weightinfo and benchmarks accordingly

* add benchmark

* remove remove_identity_consumers

* remove force_remove_identity call

* fix todo in test

* update doc

- remove request_membership
- remove validate_identity

* fix tests according to new MembershipRemovalReason

* add membership removal reasons

and clean up membership internal functions

* remove check_remove_identity

* build live tests

(but no current network to check them against)

* clippy 

* add wot tests related to issue #136

* refac certification creation checks

* refac identity creation checks

* test benchmark ok

* more precise error messages

* check benchmarks ok

* cargo cucumber ok

* cargo test workspace ok

* cargo test workspace quasi ok

* cargo check all tests

* cargo check all

* remove IdtyEvent change owner key

* remove removal other reason

* refac revocation and removal reason

* wip

* refac

* refac scheduling (tests ok)

* add *Period

* cargo test identity ok

* remove IdtyEvent::Validated

* cargo test wot ok

* cargo test wot ok

(one fails but fot the good reason)

* cargo test membership ok

* cargo check wot tests

* cargo check identity tests

* cargo check membership tests

* also remove validate trait

* remove validate_identity

* refac identity status to allow more fine-grain control

* remove unused trait

* cargo check ok

* remove indentity confirmation constraints

* remove request from membership primitives

* remove request_membership from lib.rs