Rename internals of project to be "jobs" rather than "CI builds"

[ScottG489]

This is the first step (before #15) to re-purposing and re-branding the service as a generic job runner rather than only a CI server.

We first need to rename inward facing components such as class names and other naming. We'll then follow up with renaming outward facing interfaces since other projects assume certain names, URLs, etc.

Some things we'll want to address::

• Renaming all internally facing references in code such as class names or variables to indicate it's a "job" not a "build"
• Use new project name. The name I've decided on is con job (containerized jobs)
  • I don't think renaming the project should be outwardly facing but this should be verified

Other things will likely be discovered as the work progresses.

#15 depends on this issue.

[ScottG489]

Closed by 083d3a3 and 4702e92.

Note that there may still be small follow up naming fixes necessary.