Add pluralization support to Translation component (#4441)

* Initial plan

* Add pluralization support to Translation component with comprehensive tests

Co-authored-by: gabek <414923+gabek@users.noreply.github.com>

* Javascript formatting autofixes

* Update web/tests/translation.test.tsx

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update web/components/ui/Translation/Translation.tsx

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix: linter warning

* Simplify pluralization logic: use original key for plural, only _one for singular

Co-authored-by: gabek <414923+gabek@users.noreply.github.com>

* feat(i18n): fix support for nested namespace string and key extraction

* chore: update extracted translations

* fix(i18n): fix linter warnings in extraction script

* Update web/scripts/i18n-extract.js

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* feat(i18n): sort translation keys

* fix(i18n): fix linter warnings

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: gabek <414923+gabek@users.noreply.github.com>
Co-authored-by: Owncast <owncast@owncast.online>
Co-authored-by: Gabe Kangas <gabek@real-ity.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/types/localization.ts

@@ -72,6 +72,11 @@ export const Localization = {
     settings: 'settings',
     overriddenViaCommandLine: 'Overridden via command line',
 
+    Chat: {
+      moderationMessagesSent: 'Admin.Chat.moderationMessagesSent',
+      moderationMessagesSent_one: 'Admin.Chat.moderationMessagesSent_one',
+    },
+
     // EditInstanceDetails component specific keys
     EditInstanceDetails: {
       offlineMessageDescription: 'Admin.EditInstanceDetails.offlineMessageDescription',
@@ -114,6 +119,9 @@ export const Localization = {
     testing: 'testing_string',
     another: 'another_test',
     simpleKey: 'simple_key',
+    itemCount: 'item_count',
+    messageCount: 'message_count',
+    noPluralKey: 'no_plural_key',
   },
 } as const;