v2.2.0

This release contains new features and fixes:

• New area selection UI
• Added option to change the frame rate through the UI
• Improved delay settings flexibility
• Added preferences window for easier configuration
• Added KOOHA_EXPERIMENTAL env var to show experimental (unsupported) encoders like VAAPI-VP8 and VAAPI-H264
• Added the following experimental (unsupported) encoders: VP9, AV1, and VAAPI-VP9
• Unavailable formats/encoders are now hidden from the UI
• Fixed broken audio on long recordings
• Updated translations