🌐(react) add i18n

We need to be able to use localized texts for various components, like for
accessible labels. We decided to setup a lightweight implementation of
localizable to avoid relying on an existing heavy library.
The Provider includes by default full translations for english, and it is
also made to be able to load easily any custom locale directly from the
Provider.

.circleci/config.yml

@@ -101,6 +101,20 @@ jobs:
           name: Run test suites over all workspaces
           command: yarn test
 
+  # ---- Internationalization ----
+  crowdin-upload:
+    docker:
+      - image: crowdin/cli:3.10.0
+        auth:
+          username: $DOCKER_USER
+          password: $DOCKER_PASS
+    working_directory: ~/cunningham
+    steps:
+      - *checkout_cunningham
+      - run:
+          name: upload translation files to crowdin
+          command: crowdin upload sources -c crowdin/config.yml
+
   # ---- Deploy ----
   publish-storybook:
     docker:
@@ -167,6 +181,14 @@ workflows:
           filters:
             tags:
               only: /.*/
+      # ---- Internationalization ----
+      - crowdin-upload:
+          filters:
+            branches:
+              only:
+                - main
+          requires:
+            - build
       # ---- Codebase ----
       - build:
           filters: