Update Visual Studio project files

[MrKeiKun]

Pull Request Prelude

• I have followed proper Hercules code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

1. Platform Toolset Upgrade (all .vcxproj)
   Bumped PlatformToolset from v143 (VS 2022) to v145 (VS 2022 v17.x latest) in both Release|Win32 and Debug|Win32 configurations across all servers and plugins:

• api-server, char-server, login-server, map-server
• plugin-HPMHooking_api/char/login/map, plugin-sample

2. Missing Header Files Added to Filters (.vcxproj.filters)

char-server: Added packets_hc_struct.h
login-server: Added packets_ac_struct.h and packets_ca_struct.h
map-server: Added 9 headers — mapdefines.h, messages.h, messages_ad/main/re/sak/zero.h, packets_shuffle_re.h, unitdefines.h

Issues addressed: