General housekeeping

[chao2zhang]

Please let me know if this type of PR is preferred. I tend to move minor refactoring into a separate PR when making fairly large changes.

• Refactor more config keys as key companion object
• Convert some KDocs from using # into using []
• Remove self-recursive function in Context
• Fix correct dokka task name in CONTRIBUTING.md

[codecov]

Codecov Report

Merging #3298 (64336b2) into master (37f0a1d) will increase coverage by 0.00%.
The diff coverage is 46.15%.

@@            Coverage Diff            @@
##             master    #3298   +/-   ##
=========================================
  Coverage     80.02%   80.03%           
  Complexity     2673     2673           
=========================================
  Files           443      443           
  Lines          8130     8129    -1     
  Branches       1545     1545           
=========================================
  Hits           6506     6506           
+ Misses          796      795    -1     
  Partials        828      828           

Impacted Files	Coverage Δ	Complexity Δ
...n/kotlin/io/gitlab/arturbosch/detekt/api/Config.kt	100.00% <ø> (ø)	0.00 <0.00> (ø)
...ain/kotlin/io/gitlab/arturbosch/detekt/api/Rule.kt	100.00% <ø> (ø)	15.00 <0.00> (ø)
...ch/detekt/core/config/DisabledAutoCorrectConfig.kt	44.44% <0.00%> (ø)	5.00 <0.00> (ø)
...ab/arturbosch/detekt/core/config/FailFastConfig.kt	36.36% <0.00%> (ø)	5.00 <0.00> (ø)
...ab/arturbosch/detekt/core/config/IssueExtension.kt	87.50% <ø> (ø)	0.00 <0.00> (ø)
.../kotlin/io/gitlab/arturbosch/detekt/api/Context.kt	63.63% <25.00%> (+5.30%)	0.00 <0.00> (ø)
...lin/io/gitlab/arturbosch/detekt/api/ConfigAware.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...lab/arturbosch/detekt/core/config/MaxIssueCheck.kt	94.11% <100.00%> (ø)	13.00 <0.00> (ø)
...ekt/generator/printer/rulesetpage/ConfigPrinter.kt	76.08% <100.00%> (ø)	9.00 <0.00> (ø)

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[BraisGabin]

Sure! These PRs are more than welcome. Please check my comments.