Switch from pip to uv (#529)

* Replace pip by more modern uv

* uv tests

* update yaml

* update yaml

* update yaml

* update flake8

* update windows commands

* fix windows test

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

* windows fix

.github/workflows/basic-tests-old-pytorch.yml

@@ -36,13 +36,18 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
-        pip install pytest nbval
-        pip install torch==${{ matrix.pytorch-version }}
-        pip install -r requirements.txt
-        pip install -r ch05/07_gpt_to_llama/tests/test-requirements-extra.txt
+        pip install uv
+        uv venv --python=python3.10
+        source .venv/bin/activate
+        uv pip install pytest nbval
+        uv pip install torch==${{ matrix.pytorch-version }}
+        uv pip install -r requirements.txt
+        uv pip install -r ch05/07_gpt_to_llama/tests/test-requirements-extra.txt
+        uv pip install pytest
 
     - name: Test Selected Python Scripts
       run: |
+        source .venv/bin/activate
         pytest setup/02_installing-python-libraries/tests.py
         pytest ch04/01_main-chapter-code/tests.py
         pytest ch05/01_main-chapter-code/tests.py
@@ -51,6 +56,7 @@ jobs:
 
     - name: Validate Selected Jupyter Notebooks
       run: |
+        source .venv/bin/activate
         pytest --nbval ch02/01_main-chapter-code/dataloader.ipynb
         pytest --nbval ch03/01_main-chapter-code/multihead-attention.ipynb
         pytest --nbval ch02/04_bonus_dataloader-intuition/dataloader-intuition.ipynb