build(cmake): adjust installation paths on Windows

.justfile

@@ -28,6 +28,10 @@ build:
         -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
         -DCMAKE_BUILD_TYPE=Release \
         -DCMAKE_INSTALL_PREFIX={{bindir}}/video2x-install \
+        -DCMAKE_INSTALL_BINDIR="." \
+        -DCMAKE_INSTALL_LIBDIR="." \
+        -DCMAKE_INSTALL_INCLUDEDIR=include \
+        -DCMAKE_INSTALL_DATADIR="." \
         -DVIDEO2X_USE_EXTERNAL_NCNN=OFF \
         -DVIDEO2X_USE_EXTERNAL_SPDLOG=OFF \
         -DVIDEO2X_USE_EXTERNAL_BOOST=OFF

CMakeLists.txt

@@ -367,12 +367,14 @@ install(FILES
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/Video2X"
 )
 
-# Install model files
-install(DIRECTORY "${CMAKE_SOURCE_DIR}/models"
-    DESTINATION "${CMAKE_INSTALL_DATADIR}/video2x"
-)
+# Install the model files
+if(WIN32)
+    install(DIRECTORY "${CMAKE_SOURCE_DIR}/models" DESTINATION "${CMAKE_INSTALL_DATADIR}")
+else()
+    install(DIRECTORY "${CMAKE_SOURCE_DIR}/models" DESTINATION "${CMAKE_INSTALL_DATADIR}/video2x")
+endif()
 
-# Platform-specific installation rules
+# Install the FFmpeg and ncnn shared libraries
 if(WIN32)
     file(GLOB ffmpeg_dlls "${ffmpeg_base_path}/bin/*.dll")
     install(FILES ${ffmpeg_dlls} DESTINATION "${CMAKE_INSTALL_BINDIR}")