Add custom-elements.json for each web components

[andrealeardini]

I'm submitting a:

• [ ] bug report
• [x] feature request

Related code:

{
  "version": 1,
  "tags": [
    {
      "label": "mwc-button",
      "description": "Buttons allow users to take actions, and make choices, with a single tap",
      "attributes": [...],
      "properties": [...],
      "events": [...],
      "slots": [...]
    }
  ]
}

w3c/webcomponents discussion:

• https://github.com/w3c/webcomponents/issues/776

Used by

• Open-wc catalog
• Microsoft VS Code

[fernandopasik]

It would be awesome if https://www.webcomponents.org/ would use this.

[jogibear9988]

the sample above it's from a old version of the manifest.