Build individual pages for errors, link from error output

[jamescooke]

• Build a separate documentation page for each error code.
• Ensure that each URL contains the error code and message: "-AAA05-blank-line-in-block"
• Include sections "Problematic code", "Correct code", "Rationale", "Exceptions" using a template similar to ShellCheck https://github.com/koalaman/shellcheck/wiki/Template
  • AAA01 RTD
  • AAA02 RTD
  • AAA03 RTD
  • AAA04 RTD
  • AAA05 RTD
  • AAA06 RTD
• Output link to error info page for each type of error that occurs in command line execution. Won't fix because command line removed in #226