Streaming audio file processor

[yamadapc]

• Spikes on issue/audio-file-streaming - https://github.com/yamadapc/augmented-audio/pull/new/issue/audio-file-streaming
• One option is to use https://github.com/meadowlarkdaw/creek

When recording loops and so on, it'd be beneficial to write to files (as then we don't need to pre-allocate huge amounts of memory for all tracks).

It'd also be useful to dynamically resize audio buffers; or generally come-up with a solution for dynamic sized buffers on the audio-thread.