The animated tabpanes won't work out of the box

Hi,

I had to add this CSS to make it work:

.rc-tabs-content {
  display: flex;
  width: 100%;
}

.rc-tabs-content-animated {
  -webkit-transition: margin 0.3s;
  -moz-transition: margin 0.3s;
  -ms-transition: margin 0.3s;
  -o-transition: margin 0.3s;
  transition: margin 0.3s;
}

.rc-tabs-tabpane {
  width: 100%;
  flex: none;
}

I think it would be a good idea to add those style properties to the components by default. Also the whole tab bar is fully not styled at all. I understand why this is the case, but it would be great to package a stylesheet that has any beautiful predefined style that can be copied and modified for those who only need little changes.

Start by locating the tab pane implementation and the package's current styling or build entry points; the issue identifies the affected .rc-tabs-content, .rc-tabs-content-animated, and .rc-tabs-tabpane selectors. Confirm animated tab panes work without consumer CSS, and define a packaged stylesheet approach for the tab bar whose styles can be copied and modified.