In the default implementation in GraphQLite when an operation result
has any error the status code by default is Bad Request (400), this is
not the way how GraphQL clients expects a response, with this setter we
can set a custom behavior to handle this cases.

…el into http_code_decider

# Conflicts:
#	config/graphqlite.php

Refactoring code to remove setter.

Adding an option to set HttpCodeDecider

This new Laravel command can be run using

```
./artisan graphqlite:export-schema --output file.schema
```

It will output the content of the Schema to an SDL file.
This can be useful for instance for tools like graphql-codegen.

In Webonyx, the getType() function can return null. In GraphQLite, it throws an error.
This makes using the SchemaPrinter impossible.
We override the SchemaPrinter to stop searching for the "Subscription" type.

Note: this can only work if webonyx/graphql-php#1380 is merged.

Support Laravel 11