Remove the string type refactoring

It'll be Re-introduced as an analyzer following #66.
Add an analyzer/fix for verbatim & Regular strings

The analyzer add a diagnostic to regular strings ("Hello") and verbatim
ones (@"Hello") and the code fix suggest for each one to convert to the
other.

This code was a refactoring but converted to a code fix after discussion
in #93 following the decision of #66.
Add missing help links for string representation analyzer
Merge branch 'string-types-analyzer-for-pr' of https://github.com/vbfox/code-cracker into vbfox-string-types-analyzer-for-pr

Conflicts:
	src/CodeCracker/CodeCracker.csproj
	src/CodeCracker/StringTypeCodeRefactoringProvider.cs
	test/CodeCracker.Test/CodeCracker.Test.csproj
move StringRepresentation Analyzer and fix to style folder

also delete leftover RefactoringVerifier.cs
Merge branch 'vbfox-string-types-analyzer-for-pr'