- Updates CircleCI jobs to exit early if the git diff doesn't require them to run. This will dramatically reduce our CircleCI usage and speed up the pipeline for projects like Bedrock that don't touch legacy code. The entire pipeline will still run on `develop` and `master`. The conditional logic is aware of package dependencies, so changing an upstream package will correctly trigger a build on downstream dependencies.
- Creates a new `ci-builder` image to replace `js-builder` and `go-builder`. The `ci-builder` image contains everything we need to run builds on CircleCI.
- Fixes a bunch of misspellings that should have failed the linter, but didn't.