Whitepaper chapter4

[aktsay6]

What's done:

• Chapter 4

This pull request closes #413

Actions checklist

• Implemented Rule, added Warnings
• Added tests on checks
• Added tests on fixers
• Updated diktat-analysis.yml
• Updated available-rules.md

[codecov]

Codecov Report

Merging #414 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #414   +/-   ##
=========================================
  Coverage     82.50%   82.50%           
  Complexity     1346     1346           
=========================================
  Files            65       65           
  Lines          3298     3298           
  Branches       1053     1053           
=========================================
  Hits           2721     2721           
  Misses          178      178           
  Partials        399      399           

Flag	Coverage Δ	Complexity Δ
#unittests	82.50% <ø> (ø)	1346.00 <ø> (ø)

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[orchestr7]

lgtm