fix(docs): update locale file path (#1675)

Author: Kaseax

.github/CONTRIBUTING.md

@@ -195,7 +195,7 @@ When implementing new features, follow these guidelines:
 
 1. **Add English Source Strings**
 
-   - Place all user-facing text in `apps/mail/locales/en.json`
+   - Place all user-facing text in `apps/mail/messages/en.json`
    - Organize strings according to the existing structure
    - Use descriptive, hierarchical keys that identify the feature and context
    - Example: `"pages.settings.connections.disconnectSuccess": "Account disconnected successfully"`

.github/TRANSLATION.md

@@ -31,7 +31,7 @@ Here's an example of our i18n.json configuration:
   },
   "buckets": {
     "json": {
-      "include": ["apps/mail/locales/[locale].json"]
+      "include": ["apps/mail/messages/[locale].json"]
     }
   }
 }