Extension functions for creating and verifying VC/VP proofs

@valerii.kalashnikov

Closes #40 (closed)

changed milestone to %Sprint 11 - ph2

added DevInProgress Need review labels

requested review from @yordan.kinkov

assigned to @lyuben.penkovski

added 4 commits

• d903cbb5...f80a6be7 - 2 commits from branch main
• d669dd03 - Rego functions for creating and verifying VC proofs through the signer
• 7f4ce3cf - Unit tests for rego funcs for proofs

Compare with previous version

LGTM

added 4 commits

• 7f4ce3cf...c1c4e18f - 2 commits from branch main
• 7bfdf095 - Rego functions for creating and verifying VC proofs through the signer
• 82faa8e5 - Unit tests for rego funcs for proofs

Compare with previous version

merged

mentioned in commit de38bb6b