This is a bit of a refactor based on the work done in `gh workflow` as a better approach to verify secrets created are what we expect.
Changes made:
1. Removed `env2lower` as it wasn't being used in testscripts
2. Added `replace` custom command to deal with testing organization workflow secrets
3. Refactored secret testscripts to create and run workflow that tests the value of the secret provided
4. Minor reordering of test `acceptance` test functions as appending to the end is confusing and adds conflicts
5. Removed stdout TTY assertions
This commit refactors 2 new custom commands to work more like the native env command, allowing for multiple environment variables to be set.
Additionally, the documentation on acceptance tests have been expanded to list out custom commands.
