Documentation static analysis

[kober32]

There are hundreds of English typos and mistakes in the documentation.

We should run some language analysis and fix'em all.

[hvge]

I think this would be a nice reason to split the documentation into separate chapters. One file per chapter and platform.

[petrdvorak]

I think we won't move forward until we have a documentation editor responsible for proofreading. While tools like Grammarly help, we might need a dedicated person to review the docs published by the developers.