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[bot]]

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

   164 files  ±0     164 suites  ±0   8m 39s :stopwatch: + 2m 55s 1 393 tests ±0  1 357 :heavy_check_mark: ±0  36 :zzz: ±0  0 :x: ±0  2 772 runs  ±0  2 736 :heavy_check_mark: ±0  36 :zzz: ±0  0 :x: ±0 

Results for commit 5789bec4. ± Comparison against base commit 26bc29d6.

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

[github-actions[bot]]

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

   164 files  ±0     164 suites  ±0   6m 56s :stopwatch: -2s 1 393 tests ±0  1 376 :heavy_check_mark: ±0  17 :zzz: ±0  0 :x: ±0  2 772 runs  ±0  2 755 :heavy_check_mark: ±0  17 :zzz: ±0  0 :x: ±0 

Results for commit 5789bec4. ± Comparison against base commit 26bc29d6.

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

[codecov[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.