message: Import extendTheme and mode from
  Some parts of the docs were showing to import extendTheme and mode from different location instead of however when trying to import, receives an error asking to install the specific package for that address, then update the docs to point to as the first example.
diff: @@ -142,8 +142,8 @@ styles can be a style object or a function that returns a style object.
  ```jsx live=false
  // theme.js
  -import { extendTheme } from "@chakra-ui/theme"
  -import { mode } from "@chakra-ui/theme-tools"
  +import { extendTheme } from "@chakra-ui/core"
  +import { mode } from "@chakra-ui/core"
  // Version 1: Using objects
  const theme = extendTheme({
  @@ -202,7 +202,7 @@ like this:
  ```jsx live=false
  // theme.js
  -import { extendTheme } from "@chakra-ui/theme"
  +import { extendTheme } from "@chakra-ui/core"
  // Global style overrides
  import styles from "./styles.js"
  