Tweak VSCode debug port to work with current versions

contrib/.vscode/launch.json

@@ -66,7 +66,7 @@
       "redirectOutput": true,
       "connect": {
         "host": "localhost",
-        "port": 5678
+        "port": 5679
       },
       "pathMappings": [
         {

contrib/.vscode/scripts/VSCodeAutostartDebug.FCMacro

@@ -7,7 +7,11 @@ from freecad.utils import get_python_exe
 # By default it attempts to use Freecad's PID mistaking it for python.
 # https://github.com/microsoft/debugpy/issues/262
 debugpy.configure(python=get_python_exe())
-debugpy.listen(('localhost', 5678))
+# As of Python 3.12, debugpy runs a forwarding process that listens both on the port specified here for the debugger
+# to connect to, but also on an internal port for the underlying pydevd within the python process to connect to.  The
+# default for that internal port is 5678, so we need to not duplicate it for the external port.  Also, on Linux the
+# attempt to spawn the forwarding process separately fails, so we force it to be internal to our main process.
+debugpy.listen(('localhost', 5679),in_process_debug_adapter=True)
 
 # Turns out you cannot probe debugpy to see if it is up:
 # https://github.com/microsoft/debugpy/issues/974

contrib/.vscode/scripts/WaitForDebugpy.py

@@ -13,8 +13,8 @@ def check_socket(host, port):
         return sock.connect_ex((host, port)) == 0
 
 def main():
-    # DO NOT CHECK 5678 or debugpy will break
-    # Check other port manually opened instead
+    # DO NOT CHECK the actual port 5678/5879 or debugpy will break
+    # Check that the other port 39999 used as a flag is manually opened instead
     attempt_counter = 0
     while (not check_socket('localhost', 39999)) and attempt_counter < MAX_ATTEMPTS:
         time.sleep(RETRY_DELAY_S)