Allow to change the pitch (technically named "tone frequency") of an audio.

Desired API

<Audio toneFrequence={0.9} />

When calling registerRenderAsset(), this information gets passed and when it arrives at preprocessAudioTrack, then a FFmpeg filter will be applied.

For example <Audio toneFrequency={0.9} /> could result in a asetrate=44100*0.9,aresample=44100,atempo=1/0.9 filter being applied to the audio.

Filter taken from this answer: https://stackoverflow.com/questions/53374590/ffmpeg-change-tone-frequency-keep-length-pitch-audio

Acceptance criteria

• Should implement a way to change the pitch of the audio during rendering.
• Should prevent changing the pitch over time (we do not need to support this right now)
• Add it to the <Audio> docs
• Mention limitations in docs: Must have static value per audio (no change over time), will only work during rendering and not in preview
• Implement min / max values that seem rational to your judgement

Bounty

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/bounty 200