💥Refactor the document structure

[seng1e]

This commit have lots of changes about document structure as follow:

1. Re-arranged doc structure according to the structure in the project application.
2. Modify the names of many files according to the characteristics of the document, but the content roughly the same.
3. Removed and merged some useless files and duplicate documents.
4. A temporary interface has been written for the reference module, which may be removed and rewritten later.(this part in docs/api folder, you can ignore it for a while)

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #338 (e65a98d) into master (30ce0a0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #338   +/-   ##
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  Coverage   41.13%   41.13%           
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  Files          27       27           
  Lines        1928     1928           
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  Hits          793      793           
  Misses       1135     1135           

Flag	Coverage Δ
unittests	41.13% <ø> (ø)

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[wj-Mcat]

Your pr is so great and contains so many works which need some time to read it. I will reply as soon as possible, and In this period, you can do some research on: merging the docs of python-wechaty and python-wechaty-plugin-contrib. Please feel free to tell me more if you have any cons.

[wj-Mcat]

Your docs is great.

[wj-Mcat]

This desc style is from source of typescript, we should change it to mkdocs style, the same as the api module. How do you think about it?

this desc looks weired.

[seng1e]

Yes, I found that many of the documentation descriptions were lifted directly from the typescript section, and these codes should be rewritten by python.
And I will rewrite the corresponding section later when I write this part of the document.

[wj-Mcat]

Wechaty Contributors Nomination

Link to wechaty/PMC#16