chore: import upstream snapshot with attribution

curriculum/structure/blocks/lecture-classes-and-objects.json

@@ -0,0 +1,25 @@
+{
+  "isUpcomingChange": false,
+  "dashedName": "lecture-classes-and-objects",
+  "blockLabel": "lecture",
+  "blockLayout": "challenge-list",
+  "challengeOrder": [
+    {
+      "id": "68420bd261d0d35f61922d4b",
+      "title": "How Do Classes Work and How Do They Differ From Objects?"
+    },
+    {
+      "id": "6874b5fc38f90f25e18093ce",
+      "title": "What Are Methods and Attributes, and How Do They Work?"
+    },
+    {
+      "id": "6874b7d3b286c538b39d0c25",
+      "title": "What Are Special Methods and What Are They Used For?"
+    },
+    {
+      "id": "6908d38f7cccc31602743340",
+      "title": "How to Handle Object Attributes Dynamically?"
+    }
+  ],
+  "helpCategory": "Python"
+}