Move component related to substitution overview to seperate folder

aleksis/apps/chronos/frontend/components/SubstitutionOverview.vue

 <script setup>
-import SubstitutionCard from "./SubstitutionCard.vue";
+import SubstitutionCard from "./substitutions/SubstitutionCard.vue";
 import CRUDIterator from "aleksis.core/components/generic/CRUDIterator.vue";
 import DateField from "aleksis.core/components/generic/forms/DateField.vue";
 import SubjectChip from "aleksis.apps.cursus/components/SubjectChip.vue";

aleksis/apps/chronos/frontend/components/SubstitutionCard.vue → aleksis/apps/chronos/frontend/components/substitutions/SubstitutionCard.vue

 <script setup>
 import DeleteButton from "aleksis.core/components/generic/buttons/DeleteButton.vue";
-import LessonInformation from "./LessonInformation.vue";
-import LessonRelatedObjectChip from "./LessonRelatedObjectChip.vue";
+import LessonInformation from "../LessonInformation.vue";
+import LessonRelatedObjectChip from "../LessonRelatedObjectChip.vue";
 
-import { gqlPersons } from "./amendLesson.graphql";
+import { gqlPersons } from "../amendLesson.graphql";
 
 import createOrPatchMixin from "aleksis.core/mixins/createOrPatchMixin.js";
 </script>