ci: use uv with caching for faster CI builds

.github/workflows/build-wheels.yml

@@ -32,10 +32,14 @@ jobs:
         with:
           python-version: "3.9"
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: "pyproject.toml"
+
       - name: Install build dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install build scikit-build-core setuptools-scm
+        run: uv pip install --system build scikit-build-core setuptools-scm
 
       - name: Build CFD library (Unix)
         if: runner.os != 'Windows'
@@ -106,6 +110,12 @@ jobs:
         with:
           python-version: "${{ matrix.python }}"
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: ""
+
       - uses: actions/download-artifact@v4
         with:
           name: wheel-${{ matrix.os }}
@@ -114,16 +124,14 @@ jobs:
       - name: Install wheel (Unix)
         if: runner.os != 'Windows'
         run: |
-          python -m pip install --upgrade pip
-          pip install dist/*.whl
-          pip install pytest numpy
+          uv pip install --system dist/*.whl
+          uv pip install --system pytest numpy
 
       - name: Install wheel (Windows)
         if: runner.os == 'Windows'
         run: |
-          python -m pip install --upgrade pip
-          pip install (Get-ChildItem dist/*.whl).FullName
-          pip install pytest numpy
+          uv pip install --system (Get-ChildItem dist/*.whl).FullName
+          uv pip install --system pytest numpy
 
       - name: Test import (Unix)
         if: runner.os != 'Windows'