categories in package.json

[jonyrock]

this is example from https://github.com/microsoft/vscode-python

    "categories": [
        "Programming Languages",
        "Debuggers",
        "Linters",
        "Snippets",
        "Formatters",
        "Other",
        "Extension Packs",
        "Data Science",
        "Machine Learning",
        "Notebooks"
    ],

let's make something like this here