splitArgs treated any backslash inside quotes as an escape character,
so a quoted Windows path such as -Dorg.lwjgl.glfw.libname="C:\Users\..."
lost its path separators before reaching the JVM, causing
java.nio.file.InvalidPathException at launch.
A backslash inside quotes now only escapes the matching quote or
another backslash, keeping escaped quotes functional while leaving
Windows path separators intact.
Signed-off-by: Nic <73386479+nicyoong@users.noreply.github.com>
