feat(i18n): new package for locales (#249)

* feat(i18n): new package for locales

We are renaming from zh-CN to zh-Hans with the naming regulation of BCP 47 language tags.
For future languages, suggesting to check & lookup on

- [Language subtag lookup app](https://r12a.github.io/app-subtags/)
- [iana.org/assignments/language-subtag-registry/language-subtag-registry](https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry)

to search on.

Additionally, use `en` for English is actually enforced instead of having `en-Latin`.

More resources and citations worth to check on:
- https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag
- https://en.wikipedia.org/wiki/IETF_language_tag
- https://en.wikipedia.org/wiki/ISO_15924

.vscode/settings.json

@@ -1,11 +1,10 @@
 {
-  "i18n-ally.sourceLanguage": "en",
   "i18n-ally.keystyle": "nested",
   "i18n-ally.localesPaths": [
-    "apps/stage-web/locales",
-    "apps/stage-tamagotchi/locales"
+    "packages/i18n/src/locales"
   ],
-  "i18n-ally.sortKeys": true,
+  "i18n-ally.pathMatcher": "{locale}/{namespaces}.{ext}",
+  "i18n-ally.namespace": true,
   "i18n-ally.enabledFrameworks": [
     "vue"
   ],