Add audio recording with sync option to 2d viewer

[ReneRebsdorf]

What problem is this solving

Being able to listen to communications from a discord or teamspeak server would provide great insight and context to the analyzed video

Proposed solution

• Add option for matches to allow referencing an mp3 (or other audio format)
• Provide option to sync the audio to the 2d video manually (recordings are unlikely to start at the same time as match recording)
• Based on known factors for how long it takes from a round to start after "round end", it should be possible to align each round with the correct time for the audio recording

Describe alternatives you've considered

N/A