Addon-docs: Improve DocsPage slots API (breaking)
Addon-docs: Improve DocsPage slots API (breaking)

storybooks/react-storybook,storybooks/storybook,storybooks/react-storybook,kadirahq/react-storybook,kadirahq/react-storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/react-storybook,storybooks/react-storybook,storybooks/storybook,storybooks/storybook