commands: Add TLS/HTTPS support to hugo server

commands: Add TLS/HTTPS support to hugo server

* commands: Add TLS/HTTPS support to hugo server

The "auto cert" handling in this PR is backed by mkcert (see link below).

To get this up and running on a new PC, you can:

```
hugo server trust
hugo server --tlsAuto
```

When `--tlsAuto` (or `--tlsCertFile` and `--tlsKeyFile`) is set and no `--baseURL` is provided as a flag, the server is
started with TLS and `https` as the protocol.

Note that you only need to run `hugo server trust` once per PC.

If you already have the key and the cert file (e.g. by using mkcert directly), you can do:

```
hugo server --tlsCertFile mycert.pem --tlsKeyFile mykey.pem
```

See https://github.com/FiloSottile/mkcert

Fixes #11064