Add documentation link for rules in html report

[themkat]

My attempt at #4792.

Adds a documentation link to the HTML reports, so we don't have to find it manually on the Detekt website. Looks like this:

Printed once for each rule, at the top before the rule violations are printed. The link in the picture is https://detekt.dev/docs/rules/empty-blocks/#emptyclassblock

[BraisGabin]

Thank you!

[codecov]

Codecov Report

Merging #4799 (8b699d7) into main (22bc63d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #4799   +/-   ##
=========================================
  Coverage     84.70%   84.71%           
  Complexity     3426     3426           
=========================================
  Files           491      491           
  Lines         11253    11256    +3     
  Branches       2069     2069           
=========================================
+ Hits           9532     9535    +3     
  Misses          676      676           
  Partials       1045     1045           

Impacted Files	Coverage Δ
...n/io/github/detekt/report/html/HtmlOutputReport.kt	95.65% <100.00%> (+0.14%)	⬆️

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