Use ANSI Windows API to fix improper UTF-16 use

[lachlanm-git]

Fixes #12

Use the ANSI "A" style API over wide "W" style. Fix for:

• RegQueryValueEx: affected .port_name, .system_location
• SetupDiGetDeviceRegistryProperty: affected .friendly_name, .description, .manufacturer

Also, able to remove some @ptrCast() and @as() by cleaning up API function definitions to use [*] instead of *.

[ikskuh]

Have you verified this works?

[lachlanm-git]

Have you verified this works?

Yes, verified with zig 0.11.0 on Windows 10.

1. "serial-list-info.exe" still prints OK.
   Previously I didn't notice this since I was just looking at the printed output. It looked OK as every 2nd byte of the slice was a '\0' character so wasn't observed.

2. Here is a quick verification script I've run that works for me: https://gist.github.com/lachlanm-git/8a852c42b133ba24523751e9c708c242
   It prints the number of characters which now match what I think we'd expect (previously it was twice as big).
   It then actually uses the .system_location to echo on an FTDI.