Add COLMAP installer from official repo

.gitignore

@@ -5,11 +5,7 @@ data/*
 .cache/
 
 # COLMAP binaries
-colmap/bin
-colmap/lib
-colmap/include
-colmap/share
-colmap/plugins
-colmap/COLMAP.bat
-colmap/RUN_TESTS.bat
+colmap/COLMAP/
+
+# LichtFeld Studio binaries
 /lichtfeld-studio/LichtFeld-Studio-Portable/

colmap/install.bat

@@ -1,3 +1,4 @@
-curl -LO https://github.com/lyehe/build_gpu_colmap/releases/latest/download/COLMAP-windows-latest-CUDA-cuDSS-GUI.zip
-tar -xf COLMAP-windows-latest-CUDA-cuDSS-GUI.zip
-del COLMAP-windows-latest-CUDA-cuDSS-GUI.zip
+curl -L -o colmap-x64-windows-cuda.zip "https://github.com/colmap/colmap/releases/latest/download/colmap-x64-windows-cuda.zip"
+mkdir COLMAP
+tar -xf colmap-x64-windows-cuda.zip -C COLMAP
+del colmap-x64-windows-cuda.zip