Update if-check to support CI/CD

[zanete]

What

Update if-check so that it exits with a failure response if any of the files it is checking fail to validate.

Context

We cannot currently distinguish between if-check -d runs that have failing manifests from runs with all passing manifests without manually examining the logs. This means we can;t easily ac ton the responses when we use if-check to drive our automated testing in CI/CD.

SoW

• update if-check so it exits with an error code (1) after running if-check over all manifests in a folder

Acceptance criteria

• if-check exits with an appropriate error code

GIVEN all manifests in my-folder are correct
WHEN I run if-check -d my-folder
THEN I see a series of logs:

Files match!

and the exit code is 0

GIVEN some manifests are incorrect
WHEN I run if-check -d my-folder
THEN I should see logs similar to

Files match!

Files match!

Files do not match!

Files match!

And if-check should exit with error code 1