use case to create or update KEGG entries

To do left

• Pagination of all KEGG KO items
• Route to compute all KEGG KO -> #20 (closed)
• Tests

Related issue

Closes #11 (closed)

backend/app/app/api/endpoints/keggs.py

-from typing import List
-
 from fastapi import Depends, APIRouter, HTTPException
+from fastapi_pagination import Page, paginate
 from sqlalchemy.exc import NoResultFound, IntegrityError
 from sqlmodel import Session
 
@@ -16,11 +15,11 @@ from app.core.use_cases.crud.kegg import CrudKeggOrthologyUseCase
 router = APIRouter()
 
 
-@router.get("/", response_model=List[KeggOrthologyRead])
+@router.get("/", response_model=Page[KeggOrthologyRead])
 async def get_kegg_orthology_entries(session: Session = Depends(get_session)):
     use_case = CrudKeggOrthologyUseCase()
     keggs = use_case.get_all(session=session)
-    return keggs
+    return paginate(keggs)
 
 
 @router.get("/{kegg_id}", response_model=KeggOrthologyRead)