feat!: support multiple test files

[le-yams]

Hello there,

Here is a proposal for supporting multiple test files.

Description

The action would have 2 optional parameters:

• test_path to specify a test file or folder (default value .)
• test_files_pattern to specify the pattern used to match test files (default value *.fga.yaml)

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[rhamzeh]

/easycla

[rhamzeh]

Thanks for this @le-yams!

[rhamzeh]

Going to delay merging - I know you've signed the CLA, but just trying to get the bot here. I don't think that will need any action items from you, so expect this to be merged soon!

[big-kahuna-burger]

Good stuff, but I think we should get this in CLI and then just pass the arg as is.

• Opened up an issue there, will see if I can make something happen during the holidays now.
• We need to note the breaking change, so it won't fail on people once a release gets cut out (those who don't follow naming convention, like .fga.yaml will get errors)