feat(workspaces): toggle embedded viewer branding (#4762)

* feat(viewer): embedded viewer option to hide speckle branding

* chore(viewer): can edit embed options policy

* chore(embeds): tests for new policy and gql

packages/server/modules/workspacesCore/helpers/db.ts

@@ -9,7 +9,8 @@ export const Workspaces = buildTableHelper('workspaces', [
   'updatedAt',
   'logo',
   'domainBasedMembershipProtectionEnabled',
-  'discoverabilityEnabled'
+  'discoverabilityEnabled',
+  'isEmbedSpeckleBrandingHidden'
 ])
 
 export const WorkspaceAcl = buildTableHelper('workspace_acl', [