Merge the Transkribus and file imports

src/api/index.ts

src/api/transkribus.js

src/components/Auth/Transkribus.vue

src/config.ts

src/router/index.js

src/store/auth.js

src/store/process.js

src/types/user.ts

src/views/Corpus/List.vue

src/views/Imports/ImportFromFiles.vue

src/views/Imports/Transkribus.vue

tests/unit/store/auth.spec.js

tests/unit/store/process.spec.js