feat: support for http proxy

When `HttpTunnelPort` is set in torrc (and restart), then this wrap works

```
clip-cli() {
  HTTP_PROXY="http://127.0.0.1:8118" \
  HTTPS_PROXY="http://127.0.0.1:8118" \
  NO_PROXY="localhost,127.0.0.1" \
    /path/to/cli "$@"
}
```

Maybe we can set the envs directliy in clip-cli using config param.