Wip: update the login page,

feat: update Otp in set login and transaction page.
Feat: Add validation for external account in add beneficiary.

src/app/_themes/KccbTheme.ts

@@ -12,6 +12,23 @@ export const KccbTheme = createTheme({
   primaryColor: 'kccb-colors',
   colors: {
     'kccb-colors': KccbColors
-  }
-  // primaryColor: 'kccb-colors'
+  },
+  //Typography settings
+  fontFamily: "Inter, Roboto, sans-serif",
+  headings: {
+    fontFamily: "Inter, Roboto, sans-serif",
+    fontWeight: '700',
+    sizes: {
+      h1: { fontSize: "2.2rem", lineHeight: '1.2' },
+      h2: { fontSize: "1.8rem", lineHeight: '1.3' },
+      h3: { fontSize: "1.5rem", lineHeight: '1.35' },
+    },
+  },
+  fontSizes: {
+    xs: "0.75rem",
+    sm: "0.875rem",
+    md: "1rem",
+    lg: "1.125rem",
+    xl: "1.25rem",
+  },
 });