Fix zero seed

[tanemaki]

Description

• This pull request changes the behavior when the random number seed is set to 0.
• In the current implementation, when the config.project.seed is set to 0, the seed value is not fixed to zero but randomized. After merging this pull request, when the config.project.seed is set to 0, the seed value is set to 0.
• A seed can be randomized by either removing the seed key from the YAML file or using None as the seed value (null in the YAML file).
• A warning message is generated when the seed value of 0 is used.
• Fixes [Bug]: Tricky behavior when config.project.seed is set to 0 #763.

It would be great to get feedback on my warning message because I am not a native English speaker.

Changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which refactors the code base)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the pre-commit style and check guidelines of this project.
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes

[jpcbertoldo]

thanks a lot for this PR 🙏 🙌

[ashwinvaidya17]

Thanks for addressing this!

[djdameln]

Thanks!