Development environment migration (.NET 10 and VS2026 compatible, including sorting non-compatible assets)

[daisukenishino2]

https://opentouryo.osscons.jp/index.php?%E9%83%A8%E4%BC%9A%E3%83%A1%E3%83%A2%EF%BC%882025%E5%B9%B4%EF%BC%89#sadb62cc