Plural form with default message

In the example you can use variables with defaultMessage like
```intl.get('HELLO', { name }).d(`Hello, ${name}`); // "Hello, Tony"```. But is there anyway to get defaultMessage to work with locale template like
```intl.get('HELLO', { num }).d("You have {num, plural, =0 {no photos.} =1 {one photo.} other {# photos.}}" )" })``` . For example, maybe add a parameter to `intl.get`: `intl.get(key, variables, defaultMessage)` or you may need to do some refactoring to make it work with current apis.

Start by reading the existing intl.get and defaultMessage APIs, using the plural-message example in the issue as the expected case. Determine how locale templates are currently handled and define what support for a plural defaultMessage should look like; done means the example resolves correctly without breaking the existing variable-based defaultMessage behavior.

Written by the indexing model from the issue text.