ipfs name resolve should accept url's

It would be nice if `ipfs name resove` would accept website url's so that I can just copy any past a URL from the browser into the command to see if the site is available via ipfs. For example:

```
ipfs resolve https://dist.ipfs.io/
```

instead of having to manually change the link:

```
ipfs resolve /ipns/dist.ipfs.io/
```

Start by locating the `ipfs name resolve` CLI entry point and reviewing how it parses `/ipns/...` paths. Test the example URL `https://dist.ipfs.io/` alongside `/ipns/dist.ipfs.io/`; done means the URL form resolves the same way without manual conversion.

Written by the indexing model from the issue text.