Solution to deal with the scope File System required by some smells

[olegoaer]

File System Scanner

Some smells detection are based on the File System, not on code scanning.

Proposed Solution Create a new sensor dedicated to that concern, FileSystemSensor, registered at the plugin level. To maintain performance, this sensor should only be triggered once. In the execute() callback, there is a parameter of type SensorContext which allows access to the file system (ex: sc.baseDir())