feat: add TypeScript typings builtin

[theoludwig]

What changes this PR introduce ?

• Add TypeScript typings defintions builtin so users don't need anymore @types/styled-jsx
  See Is it alive? #688 (comment).
• Disable package-lock.json in .npmrc since there wasn't a package-lock.json file
• Fix the little oversight of the previous time introduced in Update VS Code extensions in the readme #670, where I updated the way to install the VSCode extension, but I forget to also update the links

[theoludwig]

@Timer 👀

[giuseppeg]

Thanks for the PR! We should add attribution to the original author on those files.
Perhaps add a comment at the top of each file that you copied over from @types/styled-jsx

[theoludwig]

Everything should be fine now! 👍

[giuseppeg]

Yep! Thank you for the PR and patience :)

[github-actions]

🎉 This PR is included in version 3.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[theoludwig]

We've got that nice TypeScript icon on npm now! 🎉

Oops, seems like the typings folder is not included in the npm package, since you're using files array properties in package.json, I didn't know that, because by default it would be included.

I just installed the package in a test folder to see what's inside node_modules :

Excuse me for this mistake. 😞 @giuseppeg

The only things that need to change is to add a new item in the array with the value : "typings"

styled-jsx/package.json

Lines 7 to 18 in 4dd5c13

	"files": [
	"dist",
	"lib",
	"server.js",
	"babel.js",
	"babel-test.js",
	"style.js",
	"macro.js",
	"css.js",
	"webpack.js",
	"license.md"
	],

[giuseppeg]

@divlo no worries. Here's the fix https://github.com/vercel/styled-jsx/pull/694/files