64-bit: Properly prototype *all* the used functions

[Athanasius]

LCU No Fool Like One reported seeing:

exception ignored on calling ctypes callback function: <function EDLogs.game_running.<locals>.callback at 0x0000020E9C9D0EA0>
Traceback (most recent call last):
  File "monitor.pyc", line 2041, in callback
  File "monitor.pyc", line 2034, in WindowTitle
ctypes.ArgumentError: argument 1: OverflowError: int too long to convert

presumably on the 5.7.1-alpha1 64-bit pre-release. That makes File "monitor.pyc", line 2034, in WindowTitle to be the line:

length = GetWindowTextLength(h) + 1

That function hasn't been properly prototyped, so will be returning int, instead of the proper type. I note that this is also actually GetWindowTextLengthW.

So, we should really just properly prototype all of the ctypes functions we use to be sure of no issues going forwards.

[Athanasius]

Note that I couldn't reproduce this specific issue, not with 64-bit 3.11.1 under PyCharm nor with the 5.7.1-alpha1 64-bit pre-release.

[Rixxan]

It looks like pywin32's next version should include some of the holdouts we've been missing for so long.

[Rixxan]

Some work done but not marking as staged. Will be a continual thing as Pywin32 continues to be updated. Updated to my knowledge through version 306.