feat: add new examples from pocketflow-academy

cookbook/pocketflow-hello-world/docs/design.md

@@ -0,0 +1,46 @@
+# Your Project Title
+
+## Project Requirements
+A description of the project requirements. 
+
+## Utility Functions
+
+1. **Call LLM** (`utils/call_llm.py`)
+
+## Flow Design
+
+1. **First Node**
+2. **Second Node**
+3. **Third Node**
+
+### Flow Diagram
+
+```mermaid
+flowchart TD
+    firstNode[First Node] --> secondNode[Second Node]
+    secondNode --> thirdNode[Third Node]
+```
+
+## Data Structure
+
+The shared memory structure will be organized as follows:
+
+```python
+shared = {
+    "key": "value"
+}
+```
+
+## Node Designs
+
+### 1. First Node
+- **Purpose**: What the node does
+- **Design**: Regular Node (no Batch/Async)
+- **Data Access**: 
+  - Read: "key" from shared store
+  - Write: "key" to shared store
+
+### 2. Second Node
+...
+
+### 3. Third Node