fix: prevent creating quote without products

[bhavesh-018]

Issue Reference

Fix #2139

Description

This pull request prevents creating a quote without selecting any products.
It adds validation to ensure at least one product is present before a quote can be saved, avoiding incomplete or incorrect quotes.

How To Test This?

1. Go to Admin Panel → Quotes → Create Quote.
2. Fill in the required quote details without adding any products.
3. Click Save.
4. Verify that the quote is not created and an error is shown.
5. Add at least one product and save again.
6. Verify that the quote is created successfully.

Documentation

• My pull request requires an update on the documentation repository.

Branch Selection

• Target Branch: master

Tailwind Reordering

• All Tailwind classes are reordered.

[sagarkumar-webkul]

@bhavesh-018, thanks for your contribution. I’ve tested this, and the issue is resolved.

The code is currently under review.