Format output text for rule results to improve readability

[per1234]

Previously, the output text for the rule results had no formatting to speak of. It was simply a single, often long, line of text. Wrapping of this text was at the mercy of whatever displayed it. When there were multiple rule results in the output it melded into a wall of dense text.

The readability is improved by two formatting changes:

• Format the rule level (e.g., ERROR, WARNING) text and the rule message text into separate columns
• Wrap the rule message text, maintaining the column alignment after line breaks

This is accomplished by using github.com/olekukonko/tablewriter to put the result output for each rule is made into a single row, borderless table.

Example output from before this change:

ERROR: Library name Servo is in use by a library in the Library Manager index. Each library must have a unique name value. If your library is already in the index, use the "--library-manager update" flag. (Rule LP017)
WARNING: No license file found. See: https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/licensing-a-repository#detecting-a-license (Rule LD002)

after:

ERROR: Library name Servo is in use by a library in the Library Manager index. Each library must have a unique name
       value. If your library is already in the index, use the "--library-manager update" flag. (Rule LP017)
WARNING: No license file found. See:
         https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/licensing-a-repository#detecting-a-license
         (Rule LD002)

[codecov-commenter]

Codecov Report

Merging #209 (8889464) into main (24d0055) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #209      +/-   ##
==========================================
+ Coverage   87.93%   87.96%   +0.02%     
==========================================
  Files          43       43              
  Lines        4160     4170      +10     
==========================================
+ Hits         3658     3668      +10     
  Misses        391      391              
  Partials      111      111              

Flag	Coverage Δ
unit	87.96% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
internal/result/result.go	90.22% <100.00%> (+0.79%)	⬆️

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