initial work to split into dart_filament and flutter_filament

flutter_filament/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

flutter_filament/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png

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+version https://git-lfs.github.com/spec/v1
+oid sha256:93ae7d494fad0fb30cbf3ae746a39c4bc7a0f8bbf87fbb587a3f3c01f3c5ce20
+size 68

flutter_filament/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:93ae7d494fad0fb30cbf3ae746a39c4bc7a0f8bbf87fbb587a3f3c01f3c5ce20
+size 68

flutter_filament/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:93ae7d494fad0fb30cbf3ae746a39c4bc7a0f8bbf87fbb587a3f3c01f3c5ce20
+size 68

flutter_filament/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

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+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.