Add https://adamws.github.io/kicad-via-patterns/repository.json to KiCad's repository list to use these packages:

{
    "packages": [
        {
            "$schema": "https://go.kicad.org/pcm/schemas/v1",
            "name": "Via Patterns",
            "description": "Add vias using various patterns",
            "description_full": "Add vias using various patterns",
            "identifier": "com.github.adamws.kicad-via-patterns",
            "type": "plugin",
            "author": {
                "name": "adamws",
                "contact": {
                    "web": "https://adamws.github.io"
                }
            },
            "license": "MIT",
            "resources": {
                "Homepage": "https://github.com/adamws/kicad-via-patterns",
                "Bug Tracker": "https://github.com/adamws/kicad-via-patterns/issues"
            },
            "versions": [
                {
                    "version": "0.3",
                    "status": "development",
                    "kicad_version": "7.0",
                    "download_sha256": "4bfd48cda963871288e121c6c88659c5d10561bbc920ae400ed70ebf72a6d6ad",
                    "download_size": 30689,
                    "install_size": 29647,
                    "download_url": "https://adamws.github.io/kicad-via-patterns/kicad_via_patterns-0.3.dev15+gc74ff4a.zip"
                }
            ]
        }
    ]
}