Supply Persistence Storage doc

[HHoflittlefish777]

• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes https://github.com/apache/skywalking/issues/.
• Update the CHANGES log.

This is a supplement to #275

• add a diagram to explain how the io_uring works.
• Using pseudocode to define all operations.

[codecov-commenter]

Codecov Report

Merging #292 (c766222) into main (aee9148) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #292   +/-   ##
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  Coverage   44.23%   44.23%           
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  Files          93       93           
  Lines        9814     9814           
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  Hits         4341     4341           
  Misses       5055     5055           
  Partials      418      418           

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[hanahmily]

Functions and types - capitalize the first letter of each word.