Try to log exceptions in IoThread (nvaccess#14899)

Summary of the issue:
I'm still seeing access violations in the IoThread here and there, same for @bramd. I really want to track these down! We need to handle those more gracefully anyway.

Description of user facing changes
Better logging

Description of development approach
De run block of the IOThread is now wrapped in a try/except that logs the stack. I hope the stack will give us more info about what's going wrong here.

Author: LeonarddeR

source/hwIo/ioThread.py

@@ -17,6 +17,7 @@
 from inspect import ismethod
 from buildVersion import version_year
 import NVDAState
+from watchdog import getFormattedStacksForAllThreads
 
 LPOVERLAPPED_COMPLETION_ROUTINE = ctypes.WINFUNCTYPE(
 	None,
@@ -197,7 +198,12 @@ def fakeApc(param):
 		self.handle = None
 
 	def run(self):
-		while True:
-			ctypes.windll.kernel32.SleepEx(winKernel.INFINITE, True)
-			if self.exit:
-				break
+		try:
+			while True:
+				ctypes.windll.kernel32.SleepEx(winKernel.INFINITE, True)
+				if self.exit:
+					break
+		except Exception:
+			log.critical("Exception in IoThread function", exc_info=True)
+			stacks = getFormattedStacksForAllThreads()
+			log.info(f"Listing stacks for Python threads after IoThread crash:\n{stacks}")