## 🚀 Feature Proposal

Add support for the WebAuthn Automation API, a standard WebDriver extension that allows developers to create virtual authenticators to test websites using WebAuthn.

https://w3c.github.io/webauthn/#sctn-automation

_note: the above link may not work until https://github.com/w3c/webauthn/pull/1340 is merged_

## Motivation

At the moment there is no practical way to write e2e tests for pages using WebAuthn. Since this is a standard WebDriver API, the cost of implementing a layer on java is low.

## Example

For a page like this

```html
<button id="signup">Sign up with webauthn</button>
<span id="result"></span>
```

```javascript
document.getElmentById("signup").addEventListener("click", () => {
  navigator.credentials.create({...}).then(credentials => {
    document.getElementById("result").innerText = "Success!";
  })
});
```

A test could be written like so:

```java
// HasVirtualAuthenticator is an interface that augments a RemoteWebDriver.
HasVirtualAuthenticator virtualAuthenticatorManager = ((HasVirtualAuthenticator) driver);
VirtualAuthenticatorOptions options = new VirtualAuthenticatorOptions();
VirtualAuthenticator authenticator =
    virtualAuthenticatorManager.addVirtualAuthenticator(options);
driver.findElement(By.id("signup")).click();
WebElement result = driver.findElement(By.id("result"));
new WebDriverWait(driver, 60, 1000).until(
    driver -> !result.getText().equals(""));
assertThat(result.getText()).isEqualTo("Success!");
```

## Implementation

We can implement the AddVirtualAuthenticator and RemoveVirtualAuthenticator methods first since they're the most useful and follow up with the others in subsequent PRs.
String.format(
                "{Using=%s, value=%s}",
                command.getParameters().get("using"),
                command.getParameters().get("value")));
      }
      ex.addInfo(WebDriverException.DRIVER_INFO, this.getClass().getName());
      if (getSessionId() != null) {
        ex.addInfo(WebDriverException.SESSION_ID, getSessionId().toString());
      }
      if (getCapabilities() != null) {
        ex.addInfo("Capabilities", getCapabilities().toString());
      }
      throw ex;
    }
    return response;
  }
  protected Response execute(String driverCommand, Map<String, ?> parameters) {
    return execute(new CommandPayload(driverCommand, parameters));
  }
  protected Response execute(String command) {
    return execute(command, ImmutableMap.of());
  }
  protected ExecuteMethod getExecuteMethod() {
    return executeMethod;
  }
  @Override
  public void perform(Collection<Sequence> actions) {
    execute(DriverCommand.ACTIONS(actions));
  }
  @Override