Implement controller property in didDoc

[Vishwas1]

How to implement

Add controller property in DID data structure.
https://github.com/hypersign-protocol/hid-node/blob/main/proto/ssi/v1/did.proto#L11

As per spec

When a controller property is present in a DID document, its value expresses one or more DIDs.

{
  "@context": "https://www.w3.org/ns/did/v1",
  "id": "did:example:123456789abcdefghi",
  "controller": "did:example:bcehfew7h32f32h7af3",
}

Any verification methods contained in the DID documents for those DIDs SHOULD be accepted as authoritative, such that proofs that satisfy those verification methods are to be considered equivalent to proofs provided by the DID subject.

Kindly see how cheqd is doing, it looks like data type of controller should be an array, but still get it verified once.

As per cheqd doc

controller (optional): A list of fully qualified DID strings or one string. Contains one or more DIDs who can update this DIDdoc. All DIDs must exist.

"controller": ["did:cheqd:mainnet:N22KY2Dyvmuu2PyyqSFKue"]

Test in different scenario

#45

[Vishwas1]

https://docs.cheqd.io/node/architecture/adr-list/adr-002-cheqd-did-method#update-did