fix: move requirements.txt to project root in directory structure diagrams

skills/developing-datacloud-code-extension/SKILL.md

@@ -83,8 +83,8 @@ sf data-code-extension function init --package-dir <directory>
 my-transform/              # Project root
 ├── payload/               # CRITICAL: This is what --package-dir must point to for deploy
 │   ├── entrypoint.py      # Main transformation code
-│   ├── requirements.txt   # Python dependencies
 │   └── config.json        # Code extension configuration
+├── requirements.txt       # Python dependencies
 └── README.md
 ```
 

skills/developing-datacloud-code-extension/references/README.md

@@ -139,8 +139,8 @@ After `init`, you'll have:
 my-transform/
 ├── payload/
 │   ├── entrypoint.py      # Your transformation code
-│   ├── config.json        # Permissions and configuration
-│   └── requirements.txt   # Python dependencies
+│   └── config.json        # Permissions and configuration
+├── requirements.txt       # Python dependencies
 └── README.md
 ```
 

skills/developing-datacloud-code-extension/references/quick-reference.md

@@ -219,8 +219,8 @@ sf data-code-extension script scan --entrypoint ./payload/entrypoint.py
 my-project/
 ├── payload/
 │   ├── entrypoint.py      # Main code
-│   ├── config.json        # Auto-generated permissions
-│   └── requirements.txt   # Auto-generated dependencies
+│   └── config.json        # Auto-generated permissions
+├── requirements.txt       # Auto-generated dependencies
 └── README.md
 ```