Add @since annotation to niceTicks, use it in website examples

In https://github.com/recharts/recharts/pull/7009 we have added a new prop `niceTicks` to XAxis and YAxis. Two tasks:

- Add `@since 3.8` annotation to the JSDoc
- Locate 5 website examples (www/src/docs/exampleComponents) that use XAxis and 5 that use YAxis, and put niceTicks={true} prop to them so that we show off the new prop.