message: refactor: update breadcrumb color
diff: -@import '@hi-ui/core-css/index.scss';
  +@import '../../core-css/index.scss';
  .hi-breadcrumb {
  font-size: 12px;
  }
  .hi-breadcrumb__content:hover {
  - color: #4284f5;
  + color: use-color('primary');
  }
  }
  &__item:last-child {
  .hi-breadcrumb__content {
  cursor: text;
  + color: #666;
  }
  .hi-breadcrumb__separator {
  }
  }
  }
  -
  -@each $key, $value in $palette-primary {
  - .hi-breadcrumb.theme__#{$key} {
  - .hi-breadcrumb__content {
  - &:hover {
  - color: $value;
  - }
  - }
  -
  - .hi-breadcrumb__item:last-child {
  - .hi-breadcrumb__content {
  - cursor: text;
  - color: #666;
  -
  - &:hover {
  - color: #666;
  - }
  - }
  - }
  - }
  -}
  