feat(goals): add child goals management and subjects fetching
- Introduced
childGoalsEndpoints
for managing child goals. - Created
ChildGoalsStore
to handle goal creation with error handling. - Added
SubjectsStore
for fetching subjects dynamically. - Updated
AddObjectiveScreen
to utilize the new goals and subjects functionality, including form validation and dynamic subject options.
This enhances the application by allowing users to create and manage child goals effectively.
Closes IA-712