add hide_keyboard, rewrite readme

[codeskyblue]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 34.12698% with 83 lines in your changes missing coverage. Please review.

Project coverage is 27.40%. Comparing base (89ea41f) to head (5ce7e0b).
Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
uiautomator2/base.py	34.61%	68 Missing ⚠️
uiautomator2/_input.py	27.77%	13 Missing ⚠️
uiautomator2/__main__.py	0.00%	1 Missing ⚠️
uiautomator2/xpath.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1101      +/-   ##
==========================================
+ Coverage   27.01%   27.40%   +0.38%     
==========================================
  Files          20       21       +1     
  Lines        2798     2832      +34     
  Branches      422      425       +3     
==========================================
+ Hits          756      776      +20     
- Misses       2013     2027      +14     
  Partials       29       29              

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[sonarqubecloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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[khongluadao]

Please add it