* adds the contract handler file
* adds integration test for the group listening
* adds groupManagement proc
* deletes rln relay contract handler file
* brings back all the tests
* replaces toUINT256 with getIdCommitment proc
* replaces individual futures with an array of futures
* adds code documentation
* asyncSpawn instead of await
* adds untitest for toIDCommitment and toUInt256
* reorganizes the test and add rlnInstance
* mounts handleGroupUpdates on the rln peer
* asyncSpawn to await
* implements toIDCommitment
* updates the unittest
* improves the code documentation
* removes unused tests
* removes registration of the dynamic group management handler
* adds a comment
* adds a comment
* adds a TODO
* removes getIdCommitment
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