feat: support Visual Studio Code extension manifest

[fisker]

fixes: #113

Some fields ordering might need discussion, also no tests yet.

All fields: https://code.visualstudio.com/api/references/extension-manifest

• publisher - The publisher name
  go after standard package.json people fields
• displayName - The display name for the extension used in the Marketplace.
  this go next to name
• categories
  like keywords, put before keywords, like https://github.com/microsoft/vscode-eslint/blob/master/package.json#L17, and over uniq
• galleryBanner
  seems not important, at bottom
• preview
  not important, at bottom
• contributes
  after scripts
• activationEvents
  after scripts
• badges
  not important, at bottom
• markdown
  not important, at bottom
• qna
  Q & A link, after links homepage bugs repository and funding
• extensionPack
  array like bundledDependencies, next to all dependencies
• extensionDependencies
  array like bundledDependencies, next to all dependencies
• icon
  not important, at bottom

[keithamus]

🎉 This PR is included in version 1.37.0 🎉

The release is available on:

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

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