2.5.0 - .NET 7.0 Update

What's Changed

• fix theme colors by @TayouVR in #6
• upgrade project to .NetCore 7.0, swap Rug.Osc to OscCore by @TayouVR in #7
• update README by @mkc1370 in #8

変更点

• テーマカラーを修正 by @TayouVR in #6
• .NetCore 7.0にアップデートし、Rug.OscからOscCoreに変更 by @TayouVR in #7
• READMEをアップデート by @mkc1370 in #8