feat(db): Add base management of cursor

...a/fr/univnantes/webandcloud/api/controllers/v1/Posts.java

...a/fr/univnantes/webandcloud/api/controllers/v1/Users.java

...nivnantes/webandcloud/api/services/DBAncestorService.java

...ava/fr/univnantes/webandcloud/api/services/DBService.java

...r/univnantes/webandcloud/api/services/IndexedFieldOf.java

...va/fr/univnantes/webandcloud/api/services/WithCursor.java

...r/univnantes/webandcloud/api/services/db/DBFollowing.java

...ava/fr/univnantes/webandcloud/api/services/db/DBLike.java

...ava/fr/univnantes/webandcloud/api/services/db/DBUser.java

...r/univnantes/webandcloud/api/services/db/DBUserOAuth.java