[Groups] Create group via remote function (POST /groups-management/groups) #141
Description
Implement the frontend logic and UI to allow teachers to create new groups via the POST /groups-management/groups endpoint.
Requirements
- Build a group creation form (fields, validation via valibot, etc.)
- Connect the form to a SvelteKit remote function using
POST /groups-management/groups. - Match forms/UI/UX to the Tasks management pattern and style.
- Ensure feedback on creation success or error.
- Add full i18n (Paraglide).
- Prepare code for future extensible access roles.
Child of [Groups] Implement groups management for teachers (parent issue): #139 READ IT before implementing anything