remove unnecessary files and rename custom button

code/frontend/src/components/ButtonRotkehlchen.tsx

@@ -0,0 +1,32 @@
+import "./buttonRotkehlchen.css";
+
+interface ButtonPrimaryProps {
+  style: "primary" | "secondary";
+  label: string;
+  onClick?: () => void;
+}
+
+export default function ButtonPrimary({ style, label, onClick }: ButtonPrimaryProps) {
+  return (
+    <>
+      {style === "primary" && (
+        <button
+          type="submit"
+          className="button-primary body-m"
+          onClick={onClick}
+        >
+          {label}
+        </button>
+      )}
+      {style === "secondary" && (
+        <button
+          type="button"
+          className="button-secondary body-m"
+          onClick={onClick}
+        >
+          {label}
+        </button>
+      )}
+    </>
+  );
+}