<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Atm, there is no way to put the server in rescue mode

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
hcloud_server

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Atm, Since I can use the hetzner api, I'm using the following code to put it into rescue:
<!--- Paste example playbooks or commands between quotes below -->
```yaml
    - name: Enable rescue
      uri:
        url: "https://api.hetzner.cloud/v1/servers/{{ item }}/actions/enable_rescue"
        method: POST
        status_code: 201
        body_format: json
        body:
          type: "linux64"
          ssh_keys: [341997]
        headers:
          Content-Type: "application/json"
          Authorization: "Bearer {{ hostvars['localhost']['hetzner_api_token'] }}"
      with_items:
        - "{{ server_id }}"
```

<!--- HINT: You can also paste gist.github.com links for larger files -->

if self.module.params.get("backups") and self.hcloud_server.backup_window is None:
            if not self.module.check_mode:
                self.hcloud_server.enable_backup().wait_until_finished()
            self._mark_as_changed()
        elif not self.module.params.get("backups") and self.hcloud_server.backup_window is not None:
            if not self.module.check_mode:
                self.hcloud_server.disable_backup().wait_until_finished()
            self._mark_as_changed()
        labels = self.module.params.get("labels")
        if labels is not None and labels != self.hcloud_server.labels:
            if not self.module.check_mode:
                self.hcloud_server.update(labels=labels)
            self._mark_as_changed()
        server_type = self.module.params.get("server_type")
        if server_type is not None and self.hcloud_server.server_type.name != server_type:
            previous_server_status = self.hcloud_server.status
            state = self.module.params.get("state")