Migrate the search Vuex store moduel to a Pinia store

src/components/Corpus/StartIndexation.vue

src/components/Search/Facet.vue

src/components/Search/Form.vue

src/components/Search/Result.vue

src/helpers/index.ts

src/store/index.js

src/store/search.js

src/stores/index.ts

src/stores/search.ts

src/types/index.ts

src/views/Search.vue

tests/unit/store/auth.spec.js

tests/unit/store/index.spec.js

tests/unit/store/search.spec.js

tests/unit/stores/search.spec.js