feat(thene): add default config settings

Author: carwack

packages/chakra-ui-theme/src/theme/index.js

@@ -10,6 +10,12 @@ import breakpoints from './breakpoints'
 
 const space = baseSizes
 
+const config = {
+  useSystemColorMode: false,
+  initialColorMode: "light",
+  cssVarPrefix: "chakra",
+}
+
 const theme = {
   breakpoints,
   zIndices,
@@ -21,7 +27,8 @@ const theme = {
   borderWidths,
   sizes,
   shadows,
-  space
+  space,
+  config
 }
 
 export default theme

packages/chakra-ui-theme/types/index.d.ts

@@ -173,6 +173,12 @@ export type ComponentNames =
   'CTooltip' |
   'CVisuallyHidden'
 
+export interface ThemeConfig {
+  initialColorMode?: ColorMode
+  useSystemColorMode?: boolean,
+  cssVarPrefix?: string
+}
+
 declare const theme: Theme
 
 export default theme