Add Vertigo theme

Third-Party-Themes.md

@@ -82,3 +82,38 @@ Code:
   "name": "Clean"
 }
 ```
+
+### Vertigo
+
+*Classic green, subtle jitter, no frame or glowing line (repo: [crt-themes](https://github.com/qjcg/crt-themes/)).*
+
+By [@qjcg](https://github.com/qjcg/)
+
+Code:
+
+```json
+{
+  "ambientLight": 0.16,
+  "backgroundColor": "#000000",
+  "bloom": 0.65,
+  "brightness": 0.5,
+  "burnIn": 0.1969,
+  "chromaColor": 0,
+  "contrast": 0.85,
+  "flickering": 0.1,
+  "fontColor": "#aaff7f",
+  "fontName": "IBM_DOS",
+  "fontWidth": 1,
+  "frameName": "NO_FRAME",
+  "glowingLine": 0,
+  "horizontalSync": 0.16,
+  "jitter": 0.0529,
+  "rasterization": 0,
+  "rbgShift": 0,
+  "saturationColor": 0,
+  "screenCurvature": 0,
+  "staticNoise": 0,
+  "windowOpacity": 0.6961,
+  "name": "vertigo"
+}
+```