feat(I10n): add localization via CrowdIn (#18)

crowdin.yml

@@ -0,0 +1,28 @@
+---
+"base_path": "."
+"base_url": "https://api.crowdin.com"  # optional (for Crowdin Enterprise only)
+"preserve_hierarchy": true
+"pull_request_title": "chore(l10n): update translations"
+"pull_request_labels": [
+  "crowdin",
+  "l10n"
+]
+
+"files": [
+  {
+    "source": "/*.md",
+    "dest": "/%original_path%/%original_file_name%",
+    "translation": "/%original_path%/%file_name%_%two_letters_code%.%file_extension%",
+    "excluded_target_languages": [
+      "en"
+    ],
+    "languages_mapping": {
+      "two_letters_code": {
+        # map non-two letter codes here, left side is crowdin designation, right side is babel designation
+        "en-GB": "en_GB",
+        "en-US": "en_US"
+      }
+    },
+    "update_option": "update_as_unapproved"
+  }
+]