fix: replace deprecated *ngIf with @if control flow in OTP component

- Migrated all *ngIf directives to modern @if syntax in otp.component.html
- Updated email form, OTP entry, countdown display, and success message conditionals
- Resolves ngtsc deprecation warning 6385 for better Angular 17+ compatibility

src/environments/environment.ts

@@ -0,0 +1,4 @@
+export const environment = {
+    apiUrl: 'https://localhost:7013',
+    apiKey: "c6eAXYcNT873TT7BfMgQyS4ii7hxa53TLEUN7pAGaaU="
+};