Convert plugin list into machine-readable JSON format

Took the whole list and converted it to JSON, except for the Gists from [Urs Hunkler](https://gist.github.com/uhunkler) - wasn't sure if they should all be separate plugins.

Prepare the data if somebody wanted to make a website/app/etc. listing the available plugins or something like that.

**Example:**
```json
{
  "website": "https://github.com/brandonbeecroft/Lorem-Ipsum-Plugin-for-Sketch",
  "name": "Lorem-Ipsum-Plugin-for-Sketch",
  "description": "This is a plugin for quickly creating Lorem Ipsum text in Sketch",
  "owner": "brandonbeecroft"
}
```

----

Further additions might include the properties like: 
- `created`
- `updated`
- `forks`
- `stars`

Inspired by the [Bower component list](https://bower-component-list.herokuapp.com/).