Fix hardcoded colors in 2FA verification screen for dark mode

The dash and caret in the sign-in 2FA OTP input had hardcoded
`black` and `white` background colors, making them invisible
depending on theme. Replace with theme-aware colors
(`theme.font.color.primary` for the dash, `theme.font.color.light`
for the caret).

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: FelixMalfait

packages/twenty-front/src/modules/auth/sign-in-up/components/internal/SignInUpTwoFactorAuthenticationVerification.tsx

@@ -118,7 +118,7 @@ const StyledCaretContainer = styled.div`
 const StyledCaret = styled.div`
   width: 1px;
   height: 2rem;
-  background-color: white;
+  background-color: ${({ theme }) => theme.font.color.light};
 `;
 
 const FakeCaret = () => {
@@ -137,7 +137,7 @@ const StyledDashContainer = styled.div`
 `;
 
 const StyledDash = styled.div`
-  background-color: black;
+  background-color: ${({ theme }) => theme.font.color.primary};
   border-radius: 9999px;
   height: 0.25rem;
   width: 0.75rem;