Hot boundary Webpack loader

[theKashey]

based on facebook/react#16604 (comment)

create a webpack plugin which will inject hot code to the included files, for example components/**/index.js.

• - hooks should be reset only inside enclosed boundary (read generation from a context`)
• - (prevent false positives) only files with all exports matching react component patterns.
  • - Throw error in case of wrong exports in an included location.
  • - Enable dry run - check which exports would be rendered as react components.
• - (lazy interface) only for files with a single default export