Add logic to point Windows runner to target/lib folder

- The samples were failing to run on Windows because it was unable to
  find the dependent libraries for the main APDFL 18 DLL, even though
  the java.library.path argument was being set in the run command. It
  turns out there's a JDK bug where the java.library.path was not being
  honored on Windows systems:
  https://bugs.openjdk.org/browse/JDK-8213772?focusedCommentId=14222348&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14222348.

- As a workaround, let's add the path to the dependency DLLs to the system PATH
  and assign the java.library.path variable to the system PATH to see if that helps
  the samples run on Windows.

.github/workflows/test-kotlin-samples.yml

@@ -37,7 +37,11 @@ jobs:
               run: mvn -e package
             - name: Run samples
               working-directory: ${{ matrix.dir }}
-              run: java -Djava.library.path=./target/lib -Dfile.encoding=UTF-8 -jar target/${{ matrix.dir }}-1.0-SNAPSHOT-jar-with-dependencies.jar
-            - name: List files
-              run: |
-                ls ${{ github.workspace }}
+                run:  |
+                  if [ "$RUNNER_OS" == "Windows" ]; then
+                      set PATH=%PATH%;${{ github.workspace }}/${{ matrix.dir }}/target/lib
+                      echo %PATH%
+                      java -Djava.library.path=%PATH% -Dfile.encoding=UTF-8 -jar target/${{ matrix.dir }}-1.0-SNAPSHOT-jar-with-dependencies.jar
+                  elif [ "$RUNNER_OS" == "Linux" ]; then
+                      java -Djava.library.path=./target/lib -Dfile.encoding=UTF-8 -jar target/${{ matrix.dir }}-1.0-SNAPSHOT-jar-with-dependencies.jar
+                  fi