chore: initialize math-tasks project

tasks/example-multiply.json

@@ -0,0 +1,26 @@
+{
+  "id": "multiply-2-3",
+  "title": "Умножение на 2 и 3",
+  "description": "Worksheet for practicing multiplication by 2 and 3",
+  "template": "{a} × {b} = ___",
+  "variables": {
+    "a": { "type": "range", "min": 1, "max": 10 },
+    "b": { "type": "set", "values": [2, 3] }
+  },
+  "problemCount": 20,
+  "layout": {
+    "columns": 2,
+    "problemsPerPage": 20
+  },
+  "labels": {
+    "title": "Умножение",
+    "subtitle": "Реши примеры",
+    "name": "Имя: _______________",
+    "date": "Дата: _______________"
+  },
+  "theme": {
+    "background": null,
+    "icons": null,
+    "iconReward": 5
+  }
+}