feat(groups): implement group creation functionality and refactor related components

- Removed organization dependency from group creation logic.
- Introduced new route and use-case for creating groups.
- Refactored form handling for group creation into a reusable GroupForm component.
- Updated API calls to support new group creation endpoint.
- Adjusted tests to reflect changes in group creation logic and validation.
- Removed obsolete organizations route and related components.
- Updated breadcrumb navigation and routing for group management.

apps/web/src/lib/api.ts

@@ -9,6 +9,7 @@ import type {
   CreateAttendeeResult,
   CreateFirstGroup,
   CreateFirstGroupResult,
+  CreateGroupResult,
   CreateGroupWaitlistEntry,
   GroupDto,
   GroupInviteInfoDto,
@@ -79,6 +80,12 @@ export const createFirstGroup = (payload: CreateFirstGroup) =>
     body: JSON.stringify(payload),
   })
 
+export const createGroup = (payload: CreateFirstGroup) =>
+  apiFetch<CreateGroupResult>('/api/v1/groups', {
+    method: 'POST',
+    body: JSON.stringify(payload),
+  })
+
 export const getGroups = () => apiFetch<GroupList>('/api/v1/groups')
 
 export const getGroup = (groupId: string) =>