[Permissions] Implement getRoles (#9955)

In this PR

- introducing roles module to separate roles logic (assign a Role, get a
workspace's roles etc.) from permission logic (check if a user has a
permission)
- Introduces getRoles endpoint to fetch a workspace's roles
- introduces the first permission check: getRoles in only accessible to
users with permission on ROLE setting. Implemented
validatesUserHasWorkspaceSettingPermissionOrThrow

packages/twenty-shared/src/index.ts

@@ -1,5 +1,6 @@
 export * from './constants/FieldForTotalCountAggregateOperation';
 export * from './constants/Locales';
+export * from './constants/SettingsFeatures';
 export * from './constants/TwentyCompaniesBaseUrl';
 export * from './constants/TwentyIconsBaseUrl';
 export * from './types/ConnectedAccountProvider';