Draft: Migrate the elements and annotation stores

Closes #1137, #1142

• Both stores have been fully migrated but nothing has been tested.
• useElementsStore is renamed to useElementStore to conform to Pinia's store naming style, which encourages singular nouns.
• TypeScript has been upgraded, as the newer versions understood some new typing edge cases that I was hitting while migrating, and could detect more errors.
• Some API helpers have been simplified.

Components

Element

• Corpus/Datasets/Populate.vue: ...mapVuexState('elements', ['elements']),
• Element/DetailsPanel.vue: ...mapVuexState('elements', ['elements']),
• Element/ElementHeader.vue: ...mapVuexState('elements', {
• Element/Metadata/Metadata.vue: ...mapVuexState('elements', ['elements']),
• Element/OrientationPanel.vue: ...mapState('elements', ['elements']),
• HeaderActions.vue: ...mapVuexState('elements', [
• Navigation/ChildrenTree/TreeItem.vue: ...mapState('elements', ['childrenPagination', 'parents']),
• Navigation/CorpusSelection.vue: ...mapVuexState('elements', { storeElements: 'elements' }),
• Navigation/ElementNavigation.vue: ...mapVuexState('elements', { elementObjects: 'elements' }),
• Navigation/ElementNavigation.vue: ...mapVuexState('elements', ['elementsUpdate']),
• Navigation/PreviewDropdown.vue: ...mapState('elements', ['elements']),
• Process/Workers/DeleteResultsModal.vue: ...mapVuexState('elements', ['elements']),
• Element/EditionFrom.vue

Annotations

• Image/ElementZone.vue: ...mapState('annotation', ['enabled', 'hoveredId', 'selectedElement', 'batchDeletion']),
• Navigation/ChildrenTree/TreeItem.vue: ...mapState('annotation', {
• Navigation/ChildrenTree/TreeItem.vue: ...mapState('annotation', ['visible', 'hoveredId', 'selectedElement']),

Views

• Element.vue: ...mapVuexState('elements', ['elements', 'links', 'parents', 'neighbors']),