Add restricted resource lock indicators

[ewlarson]

Summary

• Add a reusable restricted-access lock indicator for resources with dct_accessRights_s: Restricted
• Show the lock to the left of restricted resource titles in list, gallery, and resource detail views
• Include Access Rights in the resource Full Details table
• Add focused coverage for the search result, gallery, resource view, and Full Details behavior

Closes #206

Validation

• npm test -- --run src/__tests__/components/SearchResults.test.tsx src/__tests__/components/search/GalleryView.test.tsx src/__tests__/components/ResourceView.test.tsx src/__tests__/components/resource/FullDetailsTable.test.tsx
• ./node_modules/.bin/tsc -p tsconfig.json --noEmit
• ./node_modules/.bin/eslint src/utils/accessRights.ts src/components/RestrictedAccessIndicator.tsx src/components/SearchResults.tsx src/components/search/GalleryView.tsx src/pages/ResourceView.tsx src/components/resource/ResourceView.tsx src/components/resource/FullDetailsTable.tsx src/__tests__/components/SearchResults.test.tsx src/__tests__/components/search/GalleryView.test.tsx src/__tests__/components/ResourceView.test.tsx src/__tests__/components/resource/FullDetailsTable.test.tsx
• Browser checked localhost:3000 restricted resource page and restricted search results

Notes

npm run lint still fails on pre-existing unrelated lint issues outside this change.