Introduced diktat-runner

[nulls]

What's done:

• added diktat-runner
• migrated diktat-cli, diktat-maven-plugin and diktat-gradle-plugin to diktat-runner

It closes #1796

[github-actions]

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

   164 files  ±0     164 suites  ±0   8m 39s ⏱️ + 2m 55s
1 393 tests ±0  1 357 ✔️ ±0  36 💤 ±0  0 ❌ ±0 
2 772 runs  ±0  2 736 ✔️ ±0  36 💤 ±0  0 ❌ ±0 

Results for commit 5789bec. ± Comparison against base commit 26bc29d.

♻️ This comment has been updated with latest results.

[github-actions]

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

   164 files  ±0     164 suites  ±0   6m 56s ⏱️ -2s
1 393 tests ±0  1 376 ✔️ ±0  17 💤 ±0  0 ❌ ±0 
2 772 runs  ±0  2 755 ✔️ ±0  17 💤 ±0  0 ❌ ±0 

Results for commit 5789bec. ± Comparison against base commit 26bc29d.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (26bc29d) 78.39% compared to head (5789bec) 78.77%.

Files	Patch %	Lines
...rtool/diktat/plugin/gradle/tasks/DiktatTaskBase.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1813      +/-   ##
============================================
+ Coverage     78.39%   78.77%   +0.37%     
+ Complexity     2432     2430       -2     
============================================
  Files           128      126       -2     
  Lines          8578     8526      -52     
  Branches       2151     2150       -1     
============================================
- Hits           6725     6716       -9     
+ Misses          893      850      -43     
  Partials        960      960              

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