list requests by category id

### Feature 2: List All Requests By category_Id

#### User story
Users can list all donation requests based on a specific category ID.

#### Pre-requisites
- [ ] Category Table
- [ ] Category DAO
- [ ] Category Service
- [ ] Requests Table
- [ ] Implement Request DAO (findAll Requests By category_Id)
- [ ] Implement Request Service (findAll Requests By category_Id)

#### Validation
- [ ] Form validation
- Category ID: Required, must be a positive integer.
- [ ] Business validation
- Category ID: categoryId exists or not

#### Flow
```mermaid
graph TD;
A["User: Find All Request by Category ID"] --> B["Request Service: Retrieve Requests by Category ID"]
B --> C["Request DAO: Find Requests by Category ID"]
C --> |Valid Category ID| D["Retrieve requests with specified Category ID"]
C --> |Invalid Category ID| E["Business Validation: Category ID does not exist"]
```