[1.x] Implement Support for Translatable Validation Attribute Errors …

…(#4070)

* chore: add validation translations

* feat: implement ability to translate validation attributes

* chore: change translation key

* style: formatting

* perf: cache `getAttributeNames`

* perf: cache `getAttributeNames`

* chore

* style: formatting

locale/en.yml

@@ -161,3 +161,23 @@ flarum-extension-manager:
 
     why_not_modal:
       title: Why Won't it Update
+
+  validation:
+    attributes:
+      minimum_stability: minimum stability
+      repositories: repositories
+      repositories.*: repositories
+      repositories.*.type: repository type
+      repositories.*.url: repository URL
+      extension_id: extension ID
+      update_mode: update mode
+      package: package
+      version: version
+      github_oauth: GitHub OAuth
+      github_oauth.*: GitHub OAuth
+      gitlab_oauth: GitLab OAuth
+      gitlab_oauth.*: GitLab OAuth
+      gitlab_token: GitLab Token
+      gitlab_token.*: GitLab Token
+      bearer: HTTP Bearer
+      bearer.*: HTTP Bearer