## 🚀 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.
public void deleteCookieNamed(String name) {
      execute(DriverCommand.DELETE_COOKIE(name));
    }
    @Override
    public void deleteCookie(Cookie cookie) {
      deleteCookieNamed(cookie.getName());
    }
    @Override
    public void deleteAllCookies() {
      execute(DriverCommand.DELETE_ALL_COOKIES);
    }
    @Override
    @SuppressWarnings({"unchecked"})
    public Set<Cookie> getCookies() {
      Object returned = execute(DriverCommand.GET_ALL_COOKIES).getValue();
      Set<Cookie> toReturn = new HashSet<>();
      if (!(returned instanceof Collection)) {
        return toReturn;
      }
      ((Collection<?>) returned).stream()
          .map(o -> (Map<String, Object>) o)
          .map(rawCookie -> {
            Cookie.Builder builder =
                new Cookie.Builder((String) rawCookie.get("name"), (String) rawCookie.get("value"))
                    .path((String) rawCookie.get("path"))
                    .domain((String) rawCookie.get("domain"))
                    .isSecure(rawCookie.containsKey("secure") && (Boolean) rawCookie.get("secure"))
                    .isHttpOnly(
                        rawCookie.containsKey("httpOnly") && (Boolean) rawCookie.get("httpOnly"));
            Number expiryNum = (Number) rawCookie.get("expiry");