chore: add coverage to workflow

Author: atkinsonholly

.github/workflows/test.yml

@@ -39,3 +39,14 @@ jobs:
         run: |
           forge test -vvv --no-match-path "test/integration/*"
         id: test
+
+      - name: Run Forge coverage
+        run: |
+          forge coverage --report lcov --no-match-path "test/integration/*"
+        id: coverage
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          files: lcov.info
+          fail_ci_if_error: false