feat: Remove 'Steuerhinweis' element from invoice template

Remove the 'Steuerhinweis' (invoice-tax-note) element with the text
'* Alle Preise verstehen sich zzgl. gesetzlicher MwSt.' from:
- INVOICE_PALETTE_ITEMS list
- INVOICE_LOCKED_TEXT_PALETTE_IDS set
- Starter layout and adjust positions of following elements

frontend/src/pages/InvoiceTemplatePage.tsx

@@ -42,7 +42,7 @@ const INVOICE_LOCKED_TEXT_PALETTE_IDS = new Set([
   "invoice-subtotal",
   "invoice-tax",
   "invoice-total",
-  "invoice-tax-note",
+
   "payment-terms",
   "bank-details",
   "issuer-name",
@@ -326,17 +326,6 @@ const INVOICE_PALETTE_ITEMS: PaletteItem[] = [
     textAlign: "right",
     defaultContent: () => "Gesamt: 113,05 €",
   },
-  {
-    id: "invoice-tax-note",
-    category: "invoice-totals",
-    label: "Steuerhinweis",
-    description: "Hinweis zur Steuerbefreiung oder -pflicht",
-    width: 400,
-    fontSize: 12,
-    fontWeight: 400,
-    textAlign: "left",
-    defaultContent: () => "* Alle Preise verstehen sich zzgl. gesetzlicher MwSt.",
-  },
   {
     id: "payment-terms",
     category: "invoice-footer",
@@ -939,10 +928,9 @@ function createInvoiceStarterLayout(user: UserOption | null, paletteItems: Palet
     createElementFromPalette(requirePaletteItem(paletteItems, "invoice-subtotal"), user, { x: 500, y: 460 }),
     createElementFromPalette(requirePaletteItem(paletteItems, "invoice-tax"), user, { x: 500, y: 486 }),
     createElementFromPalette(requirePaletteItem(paletteItems, "invoice-total"), user, { x: 500, y: 520 }),
-    createElementFromPalette(requirePaletteItem(paletteItems, "invoice-tax-note"), user, { x: 56, y: 560 }),
-    horizontalLine(56, 600, 646),
-    createElementFromPalette(requirePaletteItem(paletteItems, "payment-terms"), user, { x: 56, y: 620 }),
-    createElementFromPalette(requirePaletteItem(paletteItems, "bank-details"), user, { x: 56, y: 660 }),
+    horizontalLine(56, 560, 646),
+    createElementFromPalette(requirePaletteItem(paletteItems, "payment-terms"), user, { x: 56, y: 580 }),
+    createElementFromPalette(requirePaletteItem(paletteItems, "bank-details"), user, { x: 56, y: 620 }),
   ];
 }