Remove vcpkg.json files and revert to classic mode installation

Delete vcpkg.json manifest files from root, scripts, and attachments directories. Update Windows installation scripts to use classic mode with explicit package list instead of manifest mode. This reverts dependency management to vcpkg classic mode across the project.

Author: gpx1000

attachments/simple_engine/install_dependencies_windows.bat

@@ -24,9 +24,9 @@ set VCPKG_BINARY_SOURCES=clear;files,%TEMP%\vcpkg-cache,readwrite
 :: Create cache directory if it doesn't exist
 if not exist %TEMP%\vcpkg-cache mkdir %TEMP%\vcpkg-cache
 
-:: Install all dependencies at once using vcpkg with parallel installation
+:: Install all dependencies at once using vcpkg in classic mode
 echo Installing all dependencies...
-vcpkg install --triplet=x64-windows --x-manifest-root=%~dp0 --feature-flags=binarycaching,manifests --x-install-root=%VCPKG_INSTALLATION_ROOT%/installed
+vcpkg install glfw3 glm tinyobjloader stb tinygltf nlohmann-json ktx[vulkan] openal-soft --triplet=x64-windows
 
 :: Remind about Vulkan SDK
 echo.

attachments/simple_engine/vcpkg.json

@@ -21,9 +21,9 @@ set VCPKG_BINARY_SOURCES=clear;files,%TEMP%\vcpkg-cache,readwrite
 :: Create cache directory if it doesn't exist
 if not exist %TEMP%\vcpkg-cache mkdir %TEMP%\vcpkg-cache
 
-:: Install all dependencies at once using vcpkg with parallel installation
+:: Install all dependencies at once using vcpkg in classic mode
 echo Installing all dependencies...
-vcpkg install --triplet=x64-windows --x-manifest-root=%~dp0\.. --feature-flags=binarycaching,manifests --x-install-root=%VCPKG_INSTALLATION_ROOT%/installed
+vcpkg install glfw3 glm tinyobjloader stb tinygltf nlohmann-json ktx[vulkan] openal-soft --triplet=x64-windows
 
 :: Remind about Vulkan SDK
 echo.