feat(modal): add confirm and confirm delete modals with tests

- Implemented ConfirmModalComponent and ConfirmDeleteModalComponent for confirmation dialogs.
- Added modal service methods to open confirm and confirm delete modals.
- Created corresponding HTML and SCSS files for both modal components.
- Updated ReutilizablesTestPageComponent to utilize new modals.
- Enhanced modal service tests to cover new functionality.
- Refactored existing tests to accommodate changes in modal behavior and structure.

src/app/shared/components/confirm-delete-modal/confirm-delete-modal.component.scss

@@ -0,0 +1,19 @@
+.confirm-modal {
+  display: grid;
+  gap: 1.5rem;
+  justify-items: center;
+  text-align: center;
+}
+
+.confirm-modal__content {
+  margin: 0;
+  color: #666666;
+  line-height: 1.5;
+}
+
+.confirm-modal__actions {
+  display: flex;
+  justify-content: center;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+}