chore(vs build): update for VS2026 v14.50

[ramon-bernardo]

Pull Request Prelude

• I have followed proper The Forgotten Server 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

• With the upgrade to the latest Visual Studio release, now targeting VS2026 and the v14.50 toolset, we were able to modernize the entire project build config. This update improves compatibility with the newest compiler features, streamlines integration with the current toolchain and ensures a more consistent structure for long-term maintenance.

• Additionally, the previously used .props files were removed and their settings were migrated directly into the .vcxproj to reduce indirection and ensure clearer, centralized configuration across all build profiles.

[soul4soul]

its been a while since I used vs but I remember props being useful for keeping settings organized between the different built options and reducing duplication in the vcxproj file.

[yesits-me]

shouldn't the folder be named vc18 instead of vc145? just like the old one, other than that great change

[ramon-bernardo]

shouldn't the folder be named vc18 instead of vc145? just like the old one, other than that great change

I was trying to understand why vc17 was being used when it was running on 2022, so used the toolset version 😄...