* refactor: Add DarkTheme, new colors in theme & update components to use it
* chore: Remove 'console.log' statements
* chore: Change dark theme property from string to boolean
* feat: Add ability to toggle the theme from the drawer
* fix: Wrap typography example screen with 'withTheme'
* style: Update components to use correct dark theme colors
* style: Update dark theme primary color and rn-navigation toolbar now gets the color from the theme
* style: Add color prop to DrawerItem and update the example
* style: Change the unchecked color in both Checkbox and RadioButton
* chore: Add `yarn-error.log` to `.gitignore`
* chore: Use lodash instead of lodash.merge
* chore: Address PR comments
These components can adjust their styling automatically based on their siblings without any extra work on user's end. For example, the cover adjusts it's border radius, content adjusts it's padding, etc.
