feat(i18n): add 'billing' translation to multiple languages

- Added translations for the 'billing' navigation item in various localization files, including German, English, Spanish, French, Italian, Japanese, Polish, Thai, Filipino, and Chinese.
- Ensured consistent user experience across different locales by updating the relevant JSON files.

frontend/src/i18n/locales/de-CH.json

@@ -66,6 +66,7 @@
   "navigation": {
     "home": "Startseite",
     "members": "Mitglider",
+    "billing": "Abrechnig",
     "orders": "Bestellige",
     "diary": "Tagebuech",
     "approvals": "Freigabe",

frontend/src/i18n/locales/de-extended.json

@@ -66,6 +66,7 @@
   "navigation": {
     "home": "Startseite",
     "members": "Mitglieder",
+    "billing": "Abrechnung",
     "orders": "Bestellungen",
     "diary": "Tagebuch",
     "approvals": "Freigaben",

frontend/src/i18n/locales/en-AU.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Members",
+    "billing": "Billing",
     "orders": "Orders",
     "diary": "Diary",
     "approvals": "Approvals",

frontend/src/i18n/locales/en-GB.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Members",
+    "billing": "Billing",
     "orders": "Orders",
     "diary": "Diary",
     "approvals": "Approvals",

frontend/src/i18n/locales/en-US.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Members",
+    "billing": "Billing",
     "orders": "Orders",
     "diary": "Diary",
     "approvals": "Approvals",

frontend/src/i18n/locales/es.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Inicio",
     "members": "Miembros",
+    "billing": "Facturación",
     "orders": "Pedidos",
     "diary": "Diario",
     "approvals": "Aprobaciones",

frontend/src/i18n/locales/fil.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Mga miyembro",
+    "billing": "Pagsingil",
     "orders": "Mga order",
     "diary": "Talaarawan",
     "approvals": "Mga pag-apruba",

frontend/src/i18n/locales/fr.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Accueil",
     "members": "Membres",
+    "billing": "Facturation",
     "orders": "Commandes",
     "diary": "Journal",
     "approvals": "Approbations",

frontend/src/i18n/locales/it.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Membri",
+    "billing": "Fatturazione",
     "orders": "Ordini",
     "diary": "Diario",
     "approvals": "Approvazioni",

frontend/src/i18n/locales/ja.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "ホーム",
     "members": "メンバー",
+    "billing": "請求",
     "orders": "注文",
     "diary": "日記",
     "approvals": "承認",

frontend/src/i18n/locales/pl.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Strona główna",
     "members": "Członkowie",
+    "billing": "Rozliczenia",
     "orders": "Zamówienia",
     "diary": "Dziennik",
     "approvals": "Zatwierdzenia",

frontend/src/i18n/locales/th.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "หน้าแรก",
     "members": "สมาชิก",
+    "billing": "การเรียกเก็บเงิน",
     "orders": "คำสั่งซื้อ",
     "diary": "ไดอารี่",
     "approvals": "การอนุมัติ",

frontend/src/i18n/locales/tl.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "Home",
     "members": "Mga miyembro",
+    "billing": "Pagsingil",
     "orders": "Mga order",
     "diary": "Talaarawan",
     "approvals": "Mga pag-apruba",

frontend/src/i18n/locales/zh.json

@@ -65,6 +65,7 @@
   "navigation": {
     "home": "首页",
     "members": "成员",
+    "billing": "账单",
     "orders": "订单",
     "diary": "日记",
     "approvals": "审批",