Portainer widget

### Description

widget to connect directly to portainer to view docker containers using API

https://docs.portainer.io/api/access.

similar to implementation in [gethompage](https://gethomepage.dev/widgets/services/portainer/)

```
widget:
type: portainer
url: https://portainer.host.or.ip:9443
env: 1
key: ptr_accesskeyaccesskeyaccesskeyaccesskey
```

Would show the running , stopped and total containers

Comes in handy if you have multiple devices on network with docker, with this you'd be able to get a quick overview of containers on that device without having a remote docker sock set up