Add rewrite functionality to BECR

[CodesAway]

Enhance BECR to perform rewrites / refactoring

References and ideas

• https://comby.dev/

• Multifile replacement

• Will use ASTRewrite as part of Eclipse JDT

• Callouts for replacements (0.6.0)

  • For example, each time a match is found, call a method which the user can define
  • This would allow custom refactoring to be accomplished with BECR handling the actual details, minimizing the custom code required
  • Could use Eclipse's binding information to verify the type matches what's expected

• Ability to add imports

• Ability to track changes so can put into report or use to change another file (such as changing one file based on the matches in another file)

[CodesAway]

Initial functionality added in 0.6

• Added appendReplacement and appendTail methods
• Added replaceAll, including one which takes Function<MatchResult, String>