feat: add complex user invitation and management features

- Implemented complex member and invitation schemas using Zod for validation.
- Created new API endpoints for inviting, accepting, revoking, and canceling complex user invitations.
- Developed handlers for managing complex users, including listing, inviting, revoking, and canceling invitations.
- Added frontend components for displaying and managing complex users and invitations.
- Introduced session storage management for pending invitations.
- Integrated Gravatar for user avatars based on email.
- Created database migration for complex invitations table.

packages/api-contract/src/index.ts

@@ -27,24 +27,41 @@ export type {
   OnboardingVerifyOtpResponse,
 } from './onboarding'
 export {
+  acceptComplexInvitationsSchema,
+  complexInvitationSchema,
+  complexInvitationStatusSchema,
+  complexMemberSchema,
+  complexUsersOverviewSchema,
   complexSchema,
   complexUserRoleSchema,
   complexWithRoleSchema,
   createComplexSchema,
+  inviteComplexUserSchema,
+  revokeComplexUserSchema,
   selectComplexSchema,
   updateComplexSchema,
 } from './complex'
 export type {
+  AcceptComplexInvitationsInput,
+  AcceptComplexInvitationsResponse,
+  CancelComplexInvitationResponse,
   Complex,
+  ComplexInvitation,
+  ComplexInvitationStatus,
+  ComplexMember,
   ComplexUserRole,
   ComplexWithRole,
   CreateComplexInput,
   CreateComplexPayload,
   CreateComplexResponse,
+  ComplexUsersOverview,
   SelectComplexInput,
+  InviteComplexUserInput,
+  InviteComplexUserResponse,
   UpdateComplexInput,
   UpdateComplexPayload,
   UpdateComplexResponse,
+  RevokeComplexUserInput,
 } from './complex'
 export {
   dayOfWeekSchema,