[E] Restructure

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 84.93724% with 36 lines in your changes missing coverage. Please review.

Project coverage is 71.46%. Comparing base (82dcb87) to head (4fdef7b). Report is 1 commits behind head on master.

Files	Patch %	Lines
internal/document/pdf.go	72.00%	4 Missing and 3 partials :warning:
internal/transcribe/google_transcriber.go	0.00%	7 Missing :warning:
chew.go	50.00%	2 Missing :warning:
internal/audio/flac.go	84.62%	1 Missing and 1 partial :warning:
internal/audio/mp3.go	88.89%	1 Missing and 1 partial :warning:
internal/audio/wav.go	87.50%	1 Missing and 1 partial :warning:
internal/document/docx.go	83.34%	1 Missing and 1 partial :warning:
internal/document/pptx.go	80.00%	1 Missing and 1 partial :warning:
internal/text/csv.go	81.82%	1 Missing and 1 partial :warning:
internal/text/html.go	85.72%	1 Missing and 1 partial :warning:
... and 3 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #18 +/- ## ========================================== + Coverage 66.80% 71.46% +4.67% ========================================== Files 10 18 +8 Lines 539 543 +4 ========================================== + Hits 360 388 +28 + Misses 144 117 -27 - Partials 35 38 +3 ```

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[mmatongo]

see #17

[ccoVeille]

I see you fixed almost everything in #19, thanks