Rishab Semlani

feat: add sign blob commands

3

Adding sign blob commands. Spec Pr used for ref: https://github.com/notaryproject/notation/pull/811

feat: add inspect blob commands

4

Adding inspect blob commands. Spec Pr used for ref: https://github.com/notaryproject/notation/pull/811

Adding verify blob commands. Spec Pr used for ref: https://github.com/notaryproject/notation/pull/811