Refactor codebase to async/await - `spo page section get` until `spo propertybag remove`

-	`spo page section get`
-	`spo page section list`
-	`spo page set`
-	`spo page template list`
-	`spo page text add`
-	`Page`
-	`Propertybag-base`
-	`spo propertybag get
-	`spo propertybag list`
-	`spo propertybag remove`
