i18n(notes): add namespace JSONs (de/en/es/fr/it)

Adds page sub-namespace covering page title, stats counter, search
placeholder, new-note action, create form (title/content placeholders +
cancel/create), section labels (Angepinnt/Weitere), Unbenannt fallback,
empty state + loading.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/mana/apps/web/src/lib/i18n/locales/notes/de.json

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+{
+	"page": {
+		"page_title_html": "Notes - Mana",
+		"title": "Notes",
+		"stats_count": "{n} Notizen",
+		"search_placeholder": "Notizen durchsuchen...",
+		"action_new": "+ Neue Notiz",
+		"placeholder_title": "Titel...",
+		"placeholder_content": "Schreibe etwas...",
+		"action_cancel": "Abbrechen",
+		"action_create": "Erstellen",
+		"section_pinned": "Angepinnt",
+		"section_others": "Weitere",
+		"untitled": "Unbenannt",
+		"empty_no_notes": "Noch keine Notizen.",
+		"empty_action": "Erste Notiz erstellen",
+		"loading": "Laden..."
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/notes/en.json

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+{
+	"page": {
+		"page_title_html": "Notes - Mana",
+		"title": "Notes",
+		"stats_count": "{n} notes",
+		"search_placeholder": "Search notes…",
+		"action_new": "+ New note",
+		"placeholder_title": "Title…",
+		"placeholder_content": "Write something…",
+		"action_cancel": "Cancel",
+		"action_create": "Create",
+		"section_pinned": "Pinned",
+		"section_others": "Others",
+		"untitled": "Untitled",
+		"empty_no_notes": "No notes yet.",
+		"empty_action": "Create your first note",
+		"loading": "Loading…"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/notes/es.json

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+{
+	"page": {
+		"page_title_html": "Notes - Mana",
+		"title": "Notes",
+		"stats_count": "{n} notas",
+		"search_placeholder": "Buscar notas…",
+		"action_new": "+ Nueva nota",
+		"placeholder_title": "Título…",
+		"placeholder_content": "Escribe algo…",
+		"action_cancel": "Cancelar",
+		"action_create": "Crear",
+		"section_pinned": "Fijadas",
+		"section_others": "Otras",
+		"untitled": "Sin título",
+		"empty_no_notes": "Aún no hay notas.",
+		"empty_action": "Crea tu primera nota",
+		"loading": "Cargando…"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/notes/fr.json

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+{
+	"page": {
+		"page_title_html": "Notes - Mana",
+		"title": "Notes",
+		"stats_count": "{n} notes",
+		"search_placeholder": "Rechercher des notes…",
+		"action_new": "+ Nouvelle note",
+		"placeholder_title": "Titre…",
+		"placeholder_content": "Écris quelque chose…",
+		"action_cancel": "Annuler",
+		"action_create": "Créer",
+		"section_pinned": "Épinglées",
+		"section_others": "Autres",
+		"untitled": "Sans titre",
+		"empty_no_notes": "Pas encore de notes.",
+		"empty_action": "Créer la première note",
+		"loading": "Chargement…"
+	}
+}

apps/mana/apps/web/src/lib/i18n/locales/notes/it.json

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+{
+	"page": {
+		"page_title_html": "Notes - Mana",
+		"title": "Notes",
+		"stats_count": "{n} note",
+		"search_placeholder": "Cerca tra le note…",
+		"action_new": "+ Nuova nota",
+		"placeholder_title": "Titolo…",
+		"placeholder_content": "Scrivi qualcosa…",
+		"action_cancel": "Annulla",
+		"action_create": "Crea",
+		"section_pinned": "Fissate",
+		"section_others": "Altre",
+		"untitled": "Senza titolo",
+		"empty_no_notes": "Nessuna nota.",
+		"empty_action": "Crea la prima nota",
+		"loading": "Caricamento…"
+	}
+}