## Description 

* wallet standard interface signMessage function
* reuse existing transaction requests for sign message requests
* started transitioning from transaction requests to approval requests



https://user-images.githubusercontent.com/10210143/223243789-d92965a1-3c1a-4499-a587-b22dff6a8080.mov



https://user-images.githubusercontent.com/10210143/223244077-38c17009-c2bd-4a9f-8142-1ab4e118de7e.mov


Button text updated Sign

<img width="366" alt="Screenshot 2023-03-07 at 22 13 29"
src="https://user-images.githubusercontent.com/10210143/223566219-74d4463f-4ced-426e-8ac3-d2847f9233ed.png">


## Test Plan 

manual, use example app in wallet-adapters to sign a test message

closes APPS-510