Parser update#210

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ghost wants to merge 4 commits intomasterfrom

Commits on Sep 28, 2020

Add the initial implementation of Parser app
Albert Akhmetov
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Commits on Oct 3, 2020

Implemented the ability to upload files and retrieve page previews
albertakhmetov
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Commits on Oct 10, 2020

Implement the ability to parse a document by the template
albertakhmetov
committed

Commits on Oct 17, 2020

Implement the ability to open password-protected documents
albertakhmetov
committed