refactor: sound editor & recorder

[qiniu-x[bot]]

[Git-flow] Hi @ComfyFluffy, There are some suggestions for your information:

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Rebase suggestions

• Following commits have duplicated messages

refactor:

refactor:

Which seems insignificant, recommend to use git rebase command to reorganize your PR.

For other git-flow instructions, recommend refer to these examples.

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[ComfyFluffy]

几个 WaveformXxx 组件（以及 sum-processor.js）考虑用单独的目录（比如 Waveform）进行组织？另外可以通过 index.ts 控制下哪些文件预期对外暴露，哪些不暴露

以及 wavesurfer.js 应该可以干掉了？

Done

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