Update tutorials with post processing of html

[eduardo-proteinms]

Updated the DocumentConverter project to support post processing of html for issues that Brendan has been identifying. This should be safe to run multiple times.
 

node .\lib\skyline-cli.js --options '
{
        ""sourcePath"": ""C:/Users/Eduardo/repos/pwiz/pwiz_tools/Skyline/Documentation/Tutorials"",
        ""postProcessOnly"": true
}'

Currently this does the following:

• Replace strong and em tags with b/i
• Remove b/i tags when only used for comma, period, colon
• Remove b/i tags that just contain whitespace, but preserve whitespace
• Move trailing periods, colons or commas outside of b/i tags
• Move leading and trailing whitespace to outside of b/i tags
• Remove any empty b/i tags
• Remove empty lines before p closing tags
• Remove empty anchor tags(these come from word anchoring and are not needed)

[brendanx67]

This is going to have to be redone after I merge PR 3171.

[eduardo-proteinms]

@brendanx67 I reapplied the post processing. this should be good to merge, but let me know your thoughts.