add did:m2m method

[m2mblockchain]

DID Method Registration

As a DID method registrant, I have ensured that my DID method registration complies with the following statements:

• [X] The DID Method specification defines the DID Method Syntax.
• [X] The DID Method specification defines the Create, Read, Update, and Deactivate DID Method Operations.
• [X] The DID Method specification contains a Security Considerations section.
• [X] The DID Method specification contains a Privacy Considerations section.
• [X] The JSON file I am submitting has passed all automated validation tests below.
• [X] The JSON file contains a contactEmail address [OPTIONAL].
• [X] The JSON file contains a verifiableDataRegistry entry [OPTIONAL].

[m2mblockchain]

Here are the URLs for our solution's demo app homepage and demo scenario video:

Demo App Homepage URL: https://did.smartm2m.co.kr/

Demo Scenario Video URL: https://drive.google.com/file/d/17odd4UeGAzYhw3_MbH4wfBZMfwTk4AYC/view