Citrus Agent Maven Plugin RunTest Mojo test goal breaks when receiving a test fault json structure

**Citrus Version**

5.0.1

**Expected behavior**

When running tests using the citrus agent maven plugin and receiving a json response for a test fault the execution should report this (displaying a minus in the output) and continue waiting for the overall test execution to finish.

**Actual behavior**

Execution of the plugin breaks, error message is as follows:

```
Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type `java.lang.String` from Object value (token `JsonToken.START_OBJECT`)
at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 178, column: 13] (through reference chain: java.lang.Object[][22]->org.citrusframework.agent.plugin.model.RemoteResult["cause"])
```

**Explanation and suggested fix**

RemoteResult class of Citrus Agent Maven Plugin has field `cause` of type `java.lang.String` where the TestResult class of Citrus Agent has field `cause`declared with type `java.lang.Throwable`.

Declaring field `cause` in RemoteResult class also as Throwable fixes this issue.

I will provide a PR for this.

Start by locating the RemoteResult class in the Citrus Agent Maven Plugin and compare its cause field with the Throwable cause in the Citrus Agent TestResult class. Reproduce the RunTest Mojo with a test-fault JSON response, then verify that deserialization succeeds, the fault is reported with a minus in the output, and execution continues waiting for the overall test result.

Written by the indexing model from the issue text.