Add a "desktop" friendly init profile

#### Type:

Enhancement

#### Description:

From the discussion in https://github.com/ipfs-shipyard/ipfs-companion/issues/312#issuecomment-385334865

It would be useful to have **an init profile optimised for a desktop IPFS user.** Something like

```shell
ipfs init --profile=desktop
```

The specific use case is to allow a browser to run the daemon on behalf of the user. The user may have limited or no awareness of the daemon or the repositories existence.

Of note, as there is already a `server` profile, it might be worth considering setting up the defaults so that they match the needs of a desktop user, though I realise that may be a more disruptive change.