feat: npm init docusaurus, yarn create docusaurus (#5635)

* initial create-docusaurus impl

* cleanup

* @docusaurus/init renamed to create-docusaurus

* 0.0.6

* update lockfile

* fix lint

* remove npm2yarn for "npm init" because npm2yarn doesn't convert it and yarn result fails to execute

* prettier

* add correct version

* prettier

* prettier

* prettier

* prettier

* fix annoying --config .prettierrc issue

packages/create-docusaurus/bin/index.js

@@ -0,0 +1,64 @@
+#!/usr/bin/env node
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const chalk = require('chalk');
+const semver = require('semver');
+const path = require('path');
+const program = require('commander');
+const {default: init} = require('../lib');
+const requiredVersion = require('../package.json').engines.node;
+
+if (!semver.satisfies(process.version, requiredVersion)) {
+  console.log(
+    chalk.red(`\nMinimum Node.js version not met :)`) +
+      chalk.yellow(
+        `\nYou are using Node.js ${process.version}, Requirement: Node.js ${requiredVersion}.\n`,
+      ),
+  );
+  process.exit(1);
+}
+
+function wrapCommand(fn) {
+  return (...args) =>
+    fn(...args).catch((err) => {
+      console.error(chalk.red(err.stack));
+      process.exitCode = 1;
+    });
+}
+
+program
+  .version(require('../package.json').version)
+  .usage('<command> [options]');
+
+program
+  .command('init [siteName] [template] [rootDir]', {isDefault: true})
+  .option('--use-npm')
+  .option('--skip-install')
+  .option('--typescript')
+  .description('Initialize website.')
+  .action(
+    (siteName, template, rootDir = '.', {useNpm, skipInstall, typescript}) => {
+      wrapCommand(init)(path.resolve(rootDir), siteName, template, {
+        useNpm,
+        skipInstall,
+        typescript,
+      });
+    },
+  );
+
+program.arguments('<command>').action((cmd) => {
+  program.outputHelp();
+  console.log(`  ${chalk.red(`\n  Unknown command ${chalk.yellow(cmd)}.`)}`);
+  console.log();
+});
+
+program.parse(process.argv);
+
+if (!process.argv.slice(1).length) {
+  program.outputHelp();
+}