Add 'people in crowd' area units

These let you see how many people are in that area,
for a few different crowd densities.

macrovision.js

@@ -173,6 +173,16 @@ math.createUnit("footballFields", {
     prefixes: "long"
 });
 
+math.createUnit("peopleInLooseCrowd", {
+    definition: "1 m^2"
+})
+math.createUnit("peopleInCrowd", {
+    definition: "0.3333333333333333 m^2"
+})
+math.createUnit("peopleInDenseCrowd", {
+    definition: "0.2 m^2"
+})
+
 math.createUnit("people", {
     definition: "75 liters",
     prefixes: "long"
@@ -387,6 +397,9 @@ const unitChoices = {
             "miles^2"
         ],
         "relative": [
+            "peopleInLooseCrowd",
+            "peopleInCrowd",
+            "peopleInDenseCrowd",
             "footballFields"
         ],
         "quirky": [
@@ -2597,6 +2610,13 @@ const backgroundColors = {
     "light": "#555"
 }
 
+const settingsCategories = {
+    "background": "Background",
+    "controls": "Controls",
+    "info": "Info",
+    "visuals": "Visuals"
+}
+
 const settingsData = {
     "show-vertical-scale": {
         name: "Vertical Scale",

presets/characters.js

@@ -35274,7 +35274,15 @@ characterMakers.push(() => makeCharacter(
                 extra: 1400/711,
                 bottom: 126/1526
             },
-            form: "meowberus"
+            form: "meowberus",
+            extraAttributes: {
+                "pawArea": {
+                    name: "Paw Size",
+                    power: 2,
+                    type: "area",
+                    base: math.unit(35, "m^2")
+                }
+            }
         },
     },
     [