EPIC: Implement conversion presets

[alex6dj]

• Initial conversion presets implementation #94
  • Add missing audio channels selection (mono/stereo/...) #158
  • Implement Preset options add\delete\reorder #161
• Select preset from a default preset list #118
• Use list of formats from ffmpeg for allowed output video format #119
  • Create a list of favorite formats and show on top of all others #139
  • Move Extensions override to appsettings.json #150
• Use list of codecs from ffmpeg for use in audio/video codecs selection #120
  • Create a list of favorite codecs and show on top of all others #140
• Implement output path generation #121
• Implement basic video filters #122
• implement basic audio filters #123
  • Audio normalization #124
• Implement action selection to execute after conversion end #125
• Subtitle formating (Color, size, typography) #126
• Export and import of all/individual presets #142
  • Move default presets to external resource #173
• Duplicate an already created Preset #145
• Finish presets testing implementation #130