Initialize DTO and Controller

[MehdyBa]

• [x] Create a DTO class
• [x] Named the class DTO CreateSupportRequest.Java
• [x] Instantiate attribute fields for each form data
• [x] Add validation annotation
• [x] Add builders, getter and setter
• [x] Create a Controller class to manage requests related to the form
• [x] Named the class controller SupportRequestController.java
• [x] Do the mapping
• [x] Process the form data