extract accounts and add integration test

- add end-to-end test AccountsEndpoint
- extract get accounts from account.http to accounts.http
- extract get accounts from AccountController to AccountsController
- move spring boot test file to integration test
- add schema.sql
- add dependencies for integration test

http/account.http

@@ -15,15 +15,6 @@ Content-Type: application/json
     ]
 }
 
-### Get accounts
-GET {{hostname}}/accounts
-
-### Get accounts by page
-GET {{hostname}}/accounts/page-1
-
-### Get accounts by page and size
-GET {{hostname}}/accounts/page-1/show-5
-
 ### update user all information
 PUT {{hostname}}/account-00000000-0000-7000-0000-000000000002
 Content-Type: application/json