Provides support for Less to Docusaurus v2

1. Install docusaurus-plugin-less-hash:

   npm i -S docusaurus-plugin-less-hash

   or

   yarn add docusaurus-plugin-less-hash

2. Add the plugin to your docusaurus.config.js:

   module.exports = {
   // ...
   + plugins: ["docusaurus-plugin-less-hash"],
   // ...
   }

   or with options:

   module.exports = {
   // ...
   + plugins: ["docusaurus-plugin-less-hash", { /* options */ sourceMap: false }],
   // ...
   }

3. Write and import your stylesheets in Less as normal.