feat: cli tool

[andorsk]

build a cli tool to support various operations and. verifications. Inspiration for the interface be seen with Mattr's implementation here: https://www.youtube.com/watch?v=AVnCVzW0rkI 8:14 on.

Example calls:

ssi_cli create did create key --keyType eded25519 would create a did

If anyone has some suggestions/opinion s on the following, please note below:

1. What operations to support?
2. What should be the interface to handle the operation?
3. Name of the SDK?
4. Any design preferences?

[decentralgabe]

I like the idea. Guessing this should be a new project that uses the SDK?

[andorsk]

@decentralgabe maybe? I'm a little worried about run-away repo management. There's the cmd folder, that we could use at the beginning and if it gets to be a large project move it over?

[decentralgabe]

Yeah @andorsk agree, I think keeping it in a cmd directory here is a good first step.

[andorsk]

started a PR here: #183

[decentralgabe]

Check out https://lists.w3.org/Archives/Public/public-credentials/2022Sep/0215.html