Warn when using checked-out local build-harness rep

[Nuru]

Background

In order to ensure a known version of build-harness is run by various automation workflows, and to support development and testing of build-harness, if you have the build-harness project checked out from GitHub and it is in the same directory tree at the same or higher level than your project, the checked out version will be used instead of the latest version.

This leads to problems and confusion by end users when they have a checked out version and it is old.

Feature Request: information display

When using the local checked out version of build-harness, display:

• A notice that the local version is being used, including the exact directory where that version is located
• A warning when that version is different than the current version of the default branch of the project, or a confirmation that hte latest version is being used

Feature Request: make this behavior a feature flag

More users are confused and "bitten" by this behavior than benefit from it. Therefore:

• Make the default to be to use the auto-updated downloaded version when BUILD_HARNESS_AUTO_INIT is "true", with corresponding informational output