Find All Products using Category

### Feature: Find All Products using Category
#### Pre-requisites:
* Product table
* Product entity
* Product model
* Product Dao
* Product service

#### Validations:
* Form Validation

* category ( null, empty, pattern)
#### Message:
* Category can't null or empty
* Input category does not match any of the four options.

#### Flow:
```mermaid
graph TD;
A(ProductService) --> B(ProductDAO to reterive data)
B --> C(Get all Products from Database)
```