[generator] Nullability additional input checks (ExpediaGroup#829)

* Add additional input test

* Add required list check

* Fix linter

Co-authored-by: Shane Myrick <[email protected]>

Add new hook to override the isValidAdditionalType check (ExpediaGrou…

…p#826)

* Add new hook to override the isValidAdditionalType check

* Add filter method locations where we add other additional types

Co-authored-by: Shane Myrick <[email protected]>

[generator] Do not add interfaces for input additional types (Expedia…

…Group#821)

* Generate unique input additional types

* Do not add additional type if they are input and interfaces

* Simplify isValidAdditionalType

Co-authored-by: Shane Myrick <[email protected]>

[generator] Update additional types to work with input types (Expedia…

…Group#817)

* Update additional types to work with input types

* Add more test coverage

* Update build.gradle.kts

* Move AdditionalType class to internal

* Remove 4.0.0 comments

Co-authored-by: Shane Myrick <[email protected]>

[docs] cut documentation version for 3.x.x releases (ExpediaGroup#807)

As we prepare to start working on v4.x.x features on master we are cutting current documentation version

Valid polymorphic types in lists as input (ExpediaGroup#801)

* Valid polymorphic types in lists as input

* Add more unit tests for listtype

Co-authored-by: Shane Myrick <[email protected]>

Add invalid packages exception (ExpediaGroup#793)

Co-authored-by: Shane Myrick <[email protected]>

[build] update release build secrets (ExpediaGroup#792)

[plugin] expose timeout config for downloadSDL/introspectSchema tasks (…

…ExpediaGroup#775)

* [plugin] expose timeout configuration for downloadSDL/introspectSchema tasks

Expose new read/connect timeout configuration for downloadSDL and introspectSchema tasks (and corresponding MOJOs). Example configuration:

```kotlin
graphql {
  client {
    endpoint = "http://localhost:8080/graphql"
    packageName = "com.example.generated"

    timeout {
        // Connect timeout in milliseconds
        connect = 5_000
        // Read timeout in milliseconds
        read = 15_000
    }
  }
}
```

```xml
<plugin>
    <groupId>com.expediagroup</groupId>
    <artifactId>graphql-kotlin-maven-plugin</artifactId>
    <version>${graphql-kotlin.version}</version>
    <executions>
        <execution>
            <goals>
                <goal>introspect-schema</goal>
            </goals>
            <configuration>
                <endpoint>http://localhost:8080/graphql</endpoint>
                <!-- optional configuration below -->
                <timeoutConfiguration>
                    <!-- timeout values in milliseconds -->
                    <connect>5000</connect>
                    <read>15000</read>
                </timeoutConfiguration>
            </configuration>
        </execution>
    </executions>
</plugin>
```

Resolves: ExpediaGroup#745

* update timeout values for test

It looks like GH Actions sometimes take a bit longer to execute so bumping up the response delay from 1s to 10s.

* disable parallel maven integration tests

* enable streaming mvn logs to std out

* unique integration test maven project names

Upgrade dependencies and run ktlint format (ExpediaGroup#766)

* Upgrade dependecies and run ktlint format

* Use same default junit version for plugin

* Use published version of ktor-client-cio

Co-authored-by: Shane Myrick <[email protected]>