feat: npm init docusaurus, yarn create docusaurus

[slorber]

Motivation

Our init command is complex to type / remember:

npx @docusaurus/init@latest init [name] [template]

Using the package name create-docusaurus and {isDefault: true} allows to simplify it greatly:

npm init docusaurus
yarn create docusaurus

npx create-docusaurus also works

As this package is outside of @docusaurus org, I assigned proper roles on npm to the existing team.

Unfortunately, we need to keep @latest due to npm: npm/cli#3821

Have you read the Contributing Guidelines on pull requests?

yes

Test Plan

init tests + e2e CI tests

[netlify]

✔️ [V2]

🔨 Explore the source changes: 1c68910

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/615736ef5cf7750008d17785

😎 Browse the preview: https://deploy-preview-5635--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	74
🟢 Accessibility	98
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-5635--docusaurus-2.netlify.app/

[github-actions]

Size Change: +707 B (0%)

Total Size: 834 kB

Filename	Size	Change
website/build/assets/css/styles.********.css	93.9 kB	+53 B (0%)
website/build/assets/js/main.********.js	420 kB	+288 B (0%)
website/build/docs/index.html	44.6 kB	+53 B (0%)
website/build/docs/installation/index.html	53.1 kB	+313 B (+1%)

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	38.3 kB
website/build/blog/2017/12/14/introducing-docusaurus/index.html	67 kB
website/build/blog/index.html	38.1 kB
website/build/index.html	30.8 kB
website/build/tests/docs/index.html	25.5 kB
website/build/tests/docs/standalone/index.html	22.9 kB

_{compressed-size-action}

[netlify]

✔️ [V2]

🔨 Explore the source changes: 8186a50

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/615efd2c1bfe5200070b12a5

😎 Browse the preview: https://deploy-preview-5635--docusaurus-2.netlify.app

[lex111]

Really great idea!

[lex111]

Curious, why "0.0.6"?

[slorber]

Thanks

Just because I did some test publish attempt to make sure it works and wanted to keep the ability to increment if needed

This will be fixed on next release by lerna so it doesn't matter

[slorber]

Reverting npm2yarn temporarily because there's a bug and the Yarn tab shows yarn init => bad: nebrelbug/npm-to-yarn#21