Allow to include or exclude files from the build in .kopytkorc

[bchelkowski]

This is a Feature Proposal

Description

Allow to include or exclude files from the build.
Define it globally or for the environment.

It should work on the stage of copying files, we want to avoid copying and deleting the same files.

.kopytkorc example usage:

{
  ​​​​​​​​...
  "files": ["!/components/**/_tests/**"],
  "environments": {​​​​​​​​​​​​​​​
    "production": {​​​​​​​​​​​​​​​
      "files": [
        "!/components/**/TrackerTask.xml",
        "!/images/**/some_test_icon.png"
      ],
    }​​​​​​​​​​​​​​​,
    "test": {​​​​​​​​​​​​​​​
      "files": ["/components/**/_tests/**"]
    }​​​​​​​​​​​​​​​
  }
​​​​​​​​​​​​​​​}