Skipping builds based on a config file

[timgentry]

As a developer
I want a .rake_ci.ignore.yml file within the root of a project
so that I can identify files and folders that should be ignored by the build process.

As a developer
I want a build to be skipped if all the changed files are listed within a project's .rake_ci.ignore.yml file
So that the CI process can be speeded up by skipping zero impact changes.

An example .rake_ci.ignore.yml file could contain:

---
- code_safety.yml
- config/code_safety.yml
- docs/

[timgentry]

@joshpencheon my thinking behind the filename convention was to follow the pattern established for rake_ci.brakeman.yml, but hidden as a dot file.