Based on discussion in #90

It would be nice to have a plugin that detects the presence of TODO comments in a PR and returns the line of code along with the file name and line number it is contained in.

For example, I want to pass source.diff.files to it:

{{ source.diff.files | flagTodoComments }}

If a TODO comment is detected, then it will return a list of objects that look like this:

[
  {
    text: "//TODO: Complete this task"
    file: "some/file.js"
    line: 25
  }
]