Update Ceramic documentation for non unix OSs

There are some differences based on the OS and shells devs are using.

For example, this is fine in MacOS:
```
ceramic create tile --content '{ "title": "My first Document 7" }'
```

But in Windows the command should look like:
```
ceramic create tile --content "{ \"title\": \"My first Document 7\" }"
```

Locate the documentation for the `ceramic create tile --content` command and review how shell quoting is currently explained. Add the macOS and Windows command forms shown in the issue, making the OS or shell distinction explicit; done means users on both systems can follow the example successfully.

Written by the indexing model from the issue text.