add kirby-loop plugin with French translations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

site/plugins/loop/frontend/src/store/translations.svelte.ts

@@ -0,0 +1,19 @@
+let translations = $state<Record<string, string>>({});
+
+export const t = (key: string, fallback?: string): string => {
+    return translations[key] || fallback || key;
+};
+
+export const tt = (key: string, fallback: string, replacements: Record<string, string>): string => {
+    let text = translations[key] || fallback || key;
+    
+    for (const [placeholder, value] of Object.entries(replacements)) {
+        text = text.replace(`{${placeholder}}`, value);
+    }
+    
+    return text;
+};
+
+export const setTranslations = (newTranslations: Record<string, string>) => {
+    translations = newTranslations;
+};