Adding code style to a main readme of Diktat

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (8f4b730) 78.19% compared to head (2d4e8b6) 78.19%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1909 +/- ## ========================================= Coverage 78.19% 78.19% Complexity 2492 2492 ========================================= Files 134 134 Lines 8773 8773 Branches 2240 2240 ========================================= Hits 6860 6860 Misses 908 908 Partials 1005 1005 ```

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[github-actions[bot]]

JUnit Tests (macOS, EnricoMi/publish-unit-test-result-action@v2)

  167 files  ±0    167 suites  ±0   6m 3s :stopwatch: -39s 1 446 tests ±0  1 407 :white_check_mark: ±0  39 :zzz: ±0  0 :x: ±0  2 826 runs  ±0  2 787 :white_check_mark: ±0  39 :zzz: ±0  0 :x: ±0 

Results for commit 2d4e8b61. ± Comparison against base commit 8f4b730f.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

JUnit Tests (Windows, EnricoMi/publish-unit-test-result-action@v2)

  167 files  ±0    167 suites  ±0   7m 7s :stopwatch: -43s 1 446 tests ±0  1 429 :white_check_mark: ±0  17 :zzz: ±0  0 :x: ±0  2 826 runs  ±0  2 809 :white_check_mark: ±0  17 :zzz: ±0  0 :x: ±0 

Results for commit 2d4e8b61. ± Comparison against base commit 8f4b730f.

:recycle: This comment has been updated with latest results.