Add a mechanism to manually trigger a release entry

[kormide]

It's common for a first attempt at a BCR release to fail because it requires all of the template files to be set up correctly with no way to verify before cutting a release. There should be a way to do a test run and uncover errors before cutting a release.

[avdv]

A CLI tool would be nice to check if the current config is correct and what a dry-run would actually do. That could be integrated into a CI pipeline even...