[unreal_asset] Feature request: JSON serialization/deserialization support

[jpabscale]

It would be nice to have a bidirectional JSON serialization/deserialization capability similar to UAssetAPI so a multi-platform library/simple CLI can be provided for non-Rust developers to modify .uasset files via JSON. While dotnet runtime v8 for UAssetAPI is available on Linux and macOS, supporting even amd64 and arm64, UAssetAPI fails to serialize/deserialize .uassets under certain conditions (e.g., always fails in macOS while multiple copies of UAssetAPI fail when used in parallel on Linux amd64/arm64 or Windows arm64).