Added rustdoc check step to CI (#117)

Author: mohitsaxenaknoldus

.github/workflows/rust.yml

@@ -85,4 +85,14 @@ jobs:
         echo "Checking $path"
         cargo clippy -- -D warnings
         cd -
-        done
+        done
+
+    - name: Rustdoc check
+      run: |
+        cd ${{ steps.build.outputs.ros-workspace-directory-name }}
+        . /opt/ros/${{ matrix.ros_distro }}/setup.sh
+        for path in $(colcon list | awk '$3 == "(ament_cargo)" && $1 != "rclrs_examples" { print $2 }'); do
+        cd $path
+        cargo rustdoc -- -D warnings
+        cd -
+        done