Added the ultimatum_group migration.
deleted migration
Deleted the role class.
Deleted the TrustAllocationEntry model and split it into the TrustProposerEntry and TrustReceiverEntry class.
Deleted the UltimatumRole class.
Created the trust proposer and receiver entry migrations.
Created the trust proposer and receiver blade templates.
Created the array validation class.
Added error messages for new validation rules.
Removed the timestamp.
Renamed the Role class to UserRole.