Add single byte constructor to ObjectId

[0xh3rman]

Thanks @bmwill for your guidance in draft pr: #104, I managed to compile our implementation using sui-sdk-types and sui-transaction-builder 🙏

Will test to see if any functionality breaks later

Can we add 2 simple constructors to build Address or ObjectId from single byte? this is equivalent to ObjectID::from_single_byte in sui-types.

[unmaykr-aftermath]

@0xh3rman you may find useful our const-ructor for ObjectId (there's one for Address too). Here's how it's used.

[0xh3rman]

@0xh3rman you may find useful our const-ructor for ObjectId (there's one for Address too). Here's how it's used.

But this is another crate?