fix issues to make windows build and submodules

.gitignore

@@ -4,7 +4,6 @@ release/
 packed/
 vcpkg_installed/
 out/
-external/
 workshop/resources
 cmake-build-debug/
 .vs/

vcpkg-configuration.json

@@ -1,14 +0,0 @@
-{
-  "default-registry": {
-    "kind": "git",
-    "baseline": "4f8fe05871555c1798dbcb1957d0d595e94f7b57",
-    "repository": "https://github.com/microsoft/vcpkg"
-  },
-  "registries": [
-    {
-      "kind": "artifact",
-      "location": "https://github.com/microsoft/vcpkg-ce-catalog/archive/refs/heads/main.zip",
-      "name": "microsoft"
-    }
-  ]
-}

vcpkg.json

@@ -1,5 +0,0 @@
-{
-  "dependencies": [
-    "sdl3"
-  ]
-}