Refactor codebase to async/await – `spo theme remove` until `spo web clientsidewebpart list`

-	`spo theme remove`
-	`spo theme set`
-	`spo user ensure`
-	`spo user get`
-	`spo user list`
-	`spo user remove`
-	`spo userprofile get`
-	`spo userprofile set`
-	`spo web add`
-	`spo web clientsidewebpart list`
