OpenSources

• mdn/content
  • fix links, see https://jc-verse.github.io/mdn-graph/warnings
  • add missing documentations, see https://openwebdocs.github.io/web-docs-backlog/all/
• mdn/translated-content
  • sync translation content, see MDN Translations
• mdn/browser-compat-data
  • add impl_url for features
  • add spec_url for SVG attributes, see https://github.com/mdn/browser-compat-data/issues/24162
• mdn/data
  • add zh-CN translations for l10n
  • add missing svg css properties, see https://github.com/mdn/data/issues/750