message: Use dark theme for react-select example on landing page
diff: import Link from '@docusaurus/Link';
  +import { useColorMode } from '@docusaurus/theme-common';
  import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
  import { QueryBuilderDnD } from '@react-querybuilder/dnd';
  import CodeBlock from '@theme/CodeBlock';
  @@ -68,7 +69,9 @@ const initialSelectQuery: RuleGroupType = {
  },
  ],
  };
  -const ExtendedValueEditor_Select = (props: ValueEditorProps) => (
  +const ExtendedValueEditor_Select = (props: ValueEditorProps) => {
  + const isDarkTheme = useColorMode().colorMode === 'dark';
  + return (
  <Select
  value={props.value}
  isMulti
  @@ -78,8 +81,36 @@ const ExtendedValueEditor_Select = (props: ValueEditorProps) => (
  container: base => ({ ...base, width: '100%' }),
  menu: base => ({ ...base, zIndex: 99 }),
  }}
  + theme={theme =>
  + !isDarkTheme
  + ? theme
  + : {
  + ...theme,
  + colors: {
  + ...theme.colors,
  + // primary: theme.colors.primary, // "#2684FF",
  + // primary75: theme.colors.primary75, // "#4C9AFF",
  + // primary50: theme.colors.primary50, // "#B2D4FF",
  + primary25: '#768cad', // "#DEEBFF",
  + danger: theme.colors.dangerLight, // "#DE350B",
  + dangerLight: theme.colors.danger, // "#FFBDAD",
  + neutral0: '#222222', // "hsl(0, 0%, 100%)",
  + // neutral5: theme.colors.neutral5, // "hsl(0, 0%, 95%)",
  + neutral10: '#525252', // "hsl(0, 0%, 90%)",
  + // neutral20: theme.colors.neutral20, // "hsl(0, 0%, 80%)",
  + // neutral30: theme.colors.neutral30, // "hsl(0, 0%, 70%)",
  + // neutral40: theme.colors.neutral40, // "hsl(0, 0%, 60%)",
  + // neutral50: theme.colors.neutral50, // "hsl(0, 0%, 50%)",
  + // neutral60: theme.colors.neutral60, // "hsl(0, 0%, 40%)",
  + // neutral70: theme.colors.neutral70, // "hsl(0, 0%, 30%)",
  + neutral80: '#ffffff', // "hsl(0, 0%, 20%)",
  + // neutral90: theme.colors.neutral90, // "hsl(0, 0%, 10%)",
  + },
  + }
  + }
  />
  );
  +};
  const sliderFields = fields.filter(f => f.name === 'age');
  const initialSliderQuery: RuleGroupType = {
  