CI: Use 'uv tool run' for build and twine (#101)

* Use the astral-sh/setup-uv GitHub Action to setup the latest uv.
   - This GitHub Action can be left unpinned as it should be updated
     regularly.
* Use 'uv tool run --from build pyproject-build' to run build as the PyPI
  project name is 'build' but the executable it provides is named
  'pyproject-build'.
* Use 'uv tool run twine' to run twine.
* c.f. https://docs.astral.sh/uv/reference/cli/#uv-tool-run

.github/workflows/ci.yml

@@ -31,18 +31,15 @@ jobs:
         with:
           python-version: '3.x'
 
-      - name: Install python-build and twine
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install build twine
-          python -m pip list
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v3
 
       - name: Build v0.0.1 wheel and sdist
         run: |
-          python -m build --outdir ./dist _action_path/tests/test_package
+          uv tool run --from build pyproject-build --installer=uv --outdir ./dist _action_path/tests/test_package
 
       - name: Verify the distribution
-        run: twine check --strict dist/*
+        run: uv tool run twine check --strict dist/*
 
       - name: List contents of sdist
         run: python -m tarfile --list dist/test_package-*.tar.gz
@@ -67,7 +64,7 @@ jobs:
           # Bump version to avoid wheel name conflicts
           sed -i 's/0.0.1/0.0.2/g' _action_path/tests/test_package/pyproject.toml
           rm ./dist/*
-          python -m build --outdir ./dist _action_path/tests/test_package
+          uv tool run --from build pyproject-build --installer=uv --outdir ./dist _action_path/tests/test_package
 
       - name: Test upload with non-main label
         uses: ./_action_path/
@@ -81,7 +78,7 @@ jobs:
           # Bump version to avoid wheel name conflicts
           sed -i 's/0.0.2/0.0.3/g' _action_path/tests/test_package/pyproject.toml
           rm ./dist/*
-          python -m build --outdir ./dist _action_path/tests/test_package
+          uv tool run --from build pyproject-build --installer=uv --outdir ./dist _action_path/tests/test_package
 
       - name: Test upload with multiple labels
         uses: ./_action_path/