fix(ci): explicitly install maturin before running maturin develop

The 'uv sync' command installs project dependencies but not build-system
requirements like maturin. Added explicit 'uv pip install maturin' step
before attempting to run 'uv run maturin develop'.

Related to #22

Author: mikelane

.github/workflows/ci.yml

@@ -56,10 +56,14 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v5
 
-      - name: Install dependencies and build
-        run: |
-          uv sync --all-extras
-          uv run maturin develop
+      - name: Install dependencies
+        run: uv sync --all-extras
+
+      - name: Install maturin
+        run: uv pip install maturin
+
+      - name: Build Rust extension
+        run: uv run maturin develop
 
       - name: Run tests
         run: uv run pytest
@@ -83,10 +87,14 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v5
 
-      - name: Install dependencies and build
-        run: |
-          uv sync --all-extras
-          uv run maturin develop
+      - name: Install dependencies
+        run: uv sync --all-extras
+
+      - name: Install maturin
+        run: uv pip install maturin
+
+      - name: Build Rust extension
+        run: uv run maturin develop
 
       - name: Run tests with coverage
         run: uv run pytest --cov=dioxide --cov-report=xml --cov-report=term-missing