Add example for V2 create wallet, along with access key instructions
Add example for V2 create wallet, along with access key instructions

Summary: Add example in v2/examples on how to create a wallet using BitGoJS SDK v2

Reviewers: arik

Reviewed By: arik

Subscribers: ben

Differential Revision: https://phabricator.bitgo.com/D7582

BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS