haul migration gide

The following guide describes how to migrate from any version haul package to @haul-bundler/cli.

1. Backup old haul.config.js and babel.config.js/.babelrc.
2. Install @haul-bundler/cli:

   yarn add -D @haul-bundler/cli
   # or
   npm install --save-dev @haul-bundler/cli
   

3. Run init command:

   yarn haul init
   # or
   npx haul init
   

4. Integrate Webpack modifications from old configuration to a new one using transform property if needed.
5. If you have custom/additional Babel presets or plugins in old babel.config.js/.babelrc, add them to babel.config.js.
6. Remove HMR related logic, if you were using HMR, since we don't support it anymore.