Updated Library to .NET Core 6.0

[DontEatOreo]

Changes in no particular order

• Added File Scoped Namespaces
• Class and variable names have been updated to conform to C# Naming Conventions
• Re-Wrote DownloadFFmpeg()
• Updated DownloadYtDlp()
• Added missing await's
• The default .exe extension for setting FFMpeg and YTDL paths has been removed because it is unnecessary and allows you to avoid having to explicitly set FFmpeg and YTDL paths if they are environment variables.
• Added Dynamic Range(HDR) Pull Request #10 by onionware-github

All Unit Tests PASS