docs: ✏️ Create README for translations (#1182)

✅ Closes: ICU-3872

Co-authored-by: Dharini Jeeva <dharini@hashicorp.com>

addons/core/translations/README.md

@@ -0,0 +1,30 @@
+# Translations
+
+Translations are used to keep template, form, and component files free of raw strings and create a single source of truth for text used throughout the repository.
+
+Examples:
+
+`{{t 'states.' message.type}}`
+
+`{{t (concat "errors." this.messageCode ".description")}}`
+
+### Actions
+Action translations are reserved for actions a user can trigger.
+
+### Errors
+Translations that are for varying error titles and descriptions.
+
+### Form
+Translations for label and description text required for form fields.
+
+### Notifications
+Translations for notification messages.
+
+### Resources
+Translations with direction relation to different resources (e.g. accout, org, host).
+
+### States
+Translations for text related to different states data could be in (e.g. active, inactive, error).
+
+### Root Translations
+Translations for titles, descriptions, and translations that do not fit into other translation files.