Renames development notebook filenames

Updates references to the development notebook naming convention from `[module].ipynb` to `[module]_dev.ipynb` in documentation. This change ensures consistency across the project and aligns with the intended naming scheme for development notebooks.

PROJECT_GUIDE.md

@@ -41,7 +41,7 @@ python bin/tito.py info            # Check system status
 
 Each module follows this pattern:
 1. **Read overview**: `modules/[name]/README.md`
-2. **Work in notebook**: `modules/[name]/[name].ipynb`
+2. **Work in notebook**: `modules/[name]/[name]_dev.ipynb`
 3. **Export code**: `python bin/tito.py sync`
 4. **Run tests**: `python bin/tito.py test --module [name]`
 5. **Move to next module when tests pass**

QUICKSTART.md

@@ -64,7 +64,7 @@ cat README.md
 ### Step 3: Open the Development Notebook
 ```bash
 # Start Jupyter Lab
-jupyter lab setup.ipynb
+jupyter lab setup_dev.ipynb
 
 # The notebook will open in your browser at http://localhost:8888
 ```
@@ -125,7 +125,7 @@ graph LR
 | Command | Purpose | When to Use |
 |---------|---------|-------------|
 | `cat README.md` | Read module overview | Start of each module |
-| `jupyter lab [module].ipynb` | Open development environment | Implement code |
+| `jupyter lab [module]_dev.ipynb` | Open development environment | Implement code |
 | `python bin/tito.py sync` | Export notebooks to package | After coding in notebook |
 | `python bin/tito.py test --module [name]` | Test your implementation | Verify correctness |
 | `python bin/tito.py info` | Check system status | Anytime |
@@ -146,7 +146,7 @@ cat README.md
 
 ### Step 3: Start Building
 ```bash
-jupyter lab tensor.ipynb
+jupyter lab tensor_dev.ipynb
 ```
 
 In this module, you'll implement:
@@ -211,7 +211,7 @@ python bin/tito.py test --module setup -v
 pip install jupyter jupyterlab
 
 # Try classic notebook instead
-jupyter notebook modules/setup/setup.ipynb
+jupyter notebook modules/setup/setup_dev.ipynb
 ```
 
 ## 📚 Learning Path
@@ -281,7 +281,7 @@ You now have everything you need to start building ML systems from scratch!
 # Quick reminder of the workflow:
 cd modules/setup/          # Navigate to module
 cat README.md             # Read overview
-jupyter lab setup.ipynb   # Start implementing
+jupyter lab setup_dev.ipynb   # Start implementing
 # [work in notebook]
 python bin/tito.py sync   # Export to package
 python bin/tito.py test --module setup  # Test implementation

README.md

@@ -45,12 +45,12 @@ cd modules/setup/
 cat README.md
 
 # Open the development notebook
-jupyter lab setup.ipynb
+jupyter lab setup_dev.ipynb
 ```
 
 ### 3. Development Workflow
 
-1. **Work in module notebooks** (`modules/[module]/[module].ipynb`)
+1. **Work in module notebooks** (`modules/[module]/[module]_dev.ipynb`)
 2. **Mark code for export** with `#| export` directives
 3. **Export to package** with `python bin/tito.py sync`
 4. **Test your code** with `python bin/tito.py test --module [module]`
@@ -84,7 +84,7 @@ TinyTorch follows a progressive module structure. Each module builds on the prev
 | `python bin/tito.py test --module [name]` | Test specific module | Test tensor module |
 | `python bin/tito.py test --all` | Run all tests | Test everything |
 | `python bin/tito.py info` | Check implementation status | Show progress |
-| `jupyter lab [module].ipynb` | Start module development | Open tensor notebook |
+| `jupyter lab [module]_dev.ipynb` | Start module development | Open tensor notebook |
 
 ## 📦 Package Structure
 
@@ -132,7 +132,7 @@ cd modules/[module-name]/
 cat README.md
 
 # 3. Open development notebook
-jupyter lab [module-name].ipynb
+jupyter lab [module-name]_dev.ipynb
 
 # 4. Implement functions with #| export
 # 5. Test interactively in notebook
@@ -162,7 +162,7 @@ Each module follows a consistent structure:
 ```
 modules/[module-name]/
 ├── README.md              # 📖 Module overview and instructions
-├── [module-name].ipynb    # 📓 Main development notebook
+├── [module-name]_dev.ipynb    # 📓 Main development notebook
 ├── test_[module].py       # 🧪 Automated tests
 └── check_[module].py      # ✅ Manual verification (optional)
 ```

modules/tensor/README.md

@@ -16,7 +16,7 @@ By the end of this module, you will:
 ```
 modules/tensor/
 ├── README.md           # 📖 This file - Module overview
-├── tensor.ipynb        # 📓 Main development notebook
+├── tensor_dev.ipynb        # 📓 Main development notebook
 ├── test_tensor.py      # 🧪 Automated tests  
 └── check_tensor.py     # ✅ Manual verification (coming soon)
 ```
@@ -35,7 +35,7 @@ python bin/tito.py test --module setup  # Should pass
 cd modules/tensor/
 
 # Open the development notebook
-jupyter lab tensor.ipynb
+jupyter lab tensor_dev.ipynb
 ```
 
 ### Step 3: Work Through the Implementation