doc: update readme & add QR code

[msgui]

Purpose of the PR

• update：readme

Main Changes

• add QR code & email

Verifying these changes

This change is a trivial rework / code cleanup without any test coverage.

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - NO Need

[imbajin]

And it's better to use English in pic

consider edit/ps the pic (cut + add + override) it later

[msgui]

And it's better to use English in pic

consider edit/ps the pic (cut + add + override) it later

Sure, I'll get it done！

[codecov]

Codecov Report

Merging #249 (dbbdb24) into master (7df3b43) will increase coverage by 0.09%.
The diff coverage is n/a.

@@ Coverage Diff @@ ## master #249 +/- ## ============================================ + Coverage 85.79% 85.89% +0.09%  - Complexity 3238 3239 +1  ============================================ Files 344 344 Lines 12105 12105 Branches 1090 1090 ============================================ + Hits 10385 10397 +12  + Misses 1194 1182 -12  Partials 526 526 

see 4 files with indirect coverage changes

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[msgui]

And it's better to use English in pic

consider edit/ps the pic (cut + add + override) it later

hi @imbajin ，What do you think of the new pic？

[Radeity]

hi @imbajin ，What do you think of the new pic？

Hi, @msgui , humble suggestion, I think WeChat is better :D

[msgui]

Hi~ @Radeity ,Is the new pic what you expected? -> #256

[Radeity]

Hi~ @Radeity ,Is the new pic what you expected? -> #255

Yes, thanks for you modification.