feat: add Codecov integration for test coverage reporting

.github/workflows/python-package-conda.yml

@@ -31,7 +31,17 @@ jobs:
           poetry run ruff --format=github --target-version=py310 .
         continue-on-error: true
 
-      - name: Test with pytest
+      - name: Test with pytest and coverage
         run: |
           poetry install --with dev
-          poetry run pytest -v -s
+          poetry run pip install pytest-cov
+          poetry run pytest -v -s --cov=ipapi --cov-report=xml
+
+      - name: Upload coverage to Codecov
+        if: matrix.python-version == '3.10'
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage.xml
+          fail_ci_on_error: false
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

codecov.yml

@@ -0,0 +1,17 @@
+codecov:
+  require_ci_to_pass: true
+
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 5%
+    patch:
+      default:
+        target: 80%
+
+comment:
+  layout: "reach,diff,flags,files"
+  behavior: default
+  require_changes: false