List all flight

### Feature: list all flight

#### Pre-requisites:
- [ ] complete create flight feature
- [ ] Flight DAO( listAll Flight )
- [ ] Flight service ( listAll ( ) )
#### Validations:
- [ ] Form Validation
- [ ] Business Validation
* check the flight table.
#### Messages:
* flighttable not exist
#### Flow:
```mermaid
graph TD;

A[Value Passed to Flightservice - flight Object] --> B[Form Validation & Business Validation]

B--> C{Validation Result}

C -- Valid --> D[Value Passed to flightDAO]

D --> E[display the data]

C -- Invalid --> F[Validation Exception]
```

Start by locating the existing create-flight feature, then follow the Flight DAO listAll Flight and Flight service listAll entry points described in the issue. Check how form and business validation, the flight table, and validation exceptions are handled. Done means the service passes valid data to the DAO, displays all flights, and reports when the flight table does not exist.

Written by the indexing model from the issue text.