VSCode italics in (almost) any theme

vscode-italics.json

// All you need to do is add a font that has pretty good itlaics support i.e Fira, Operator, etc. and then add these two params to your existing User settings.

{
 "editor.fontFamily": "'Operator Mono', Menlo, Monaco, 'Courier New', monospace",
 "editor.tokenColorCustomizations": {
     "textMateRules": [
      {
        "scope": [
          "comment",
          "keyword.control",
          "keyword.operator.new",
          "keyword.operator.assignment",
          "keyword.operator.arithmetic",
          "storage.modifier",
          "storage.type",
          "support.class",
          "support.constant",
          "support.other",
          "entity.name.method",
          "entity.name.section",
          "entity.name.selector",
          "entity.name.type",
          "entity.other",
          "entity.other.attribute-name",
          "entity.other.inherited-class"
        ],
        "settings": {
          "fontStyle": "italic"
        }
      },
      {
        "scope": ["storage.type.function.arrow", "meta.paragraph.markdown"],
        "settings": {
          "fontStyle": ""
        }
      }
    ]
  }
}