feat: log process PID in Launcher (#7152)

HMCL/src/main/java/org/jackhuang/hmcl/Launcher.java

@@ -282,6 +282,10 @@ public final class Launcher extends Application {
                 LOG.info("Processor Identifier: " + System.getenv("PROCESSOR_IDENTIFIER"));
             }
             LOG.info("System Architecture: " + Architecture.SYSTEM_ARCH.getDisplayName());
+            try {
+                LOG.info("Process PID: " + ProcessHandle.current().pid());
+            } catch (UnsupportedOperationException ignored) {
+            }
             LOG.info("Native Encoding: " + OperatingSystem.NATIVE_CHARSET);
             LOG.info("JNU Encoding: " + System.getProperty("sun.jnu.encoding"));
             if (OperatingSystem.CURRENT_OS == OperatingSystem.WINDOWS) {