[plugins.json] Add cocoapods-catalyst-support

Please add the following entry to the `plugins.json` file:

```
{
"gem": "cocoapods-catalyst-support",
"name": "CocoaPods Catalyst Support",
"author": "fermoya",
"url": "https://github.com/fermoya/cocoapods-catalyst-support",
"description": "Many libraries you may use for iOS won't compile for your macCatalyst App, thus, making porting your App to the Mac world more difficult than initially expected. This is due to those libraries not being compiled for `x86_64`. `cocoapods-catalyst-support` helps you configure which libraries you'll be using for iOS and which for macCatalyst."
}
```

Open the repository's plugins.json file and locate the existing plugin entries. Add the cocoapods-catalyst-support entry with the supplied metadata, then verify that the JSON remains valid and the new plugin appears in the catalog.

Written by the indexing model from the issue text.