Add MIT rule variant with attribution and no-endorsement clause

[dikshaa2909]

Fixes #4719

Summary

This PR adds a new MIT license rule variant that includes an explicit
attribution requirement and a no-endorsement clause, as used by
Sinusoidal Systems AB.

The rule follows existing ScanCode license rule conventions and does not
introduce any code or logic changes.

Details

• Added a new MIT license rule covering attribution + no-endorsement language
• Rule text matches the upstream license wording used by Sinusoidal Systems AB
• Curly-brace markers ({{ }}) are used only inside the license text body,
  consistent with existing MIT rules in the repository
• No required_phrases metadata is used, in line with similar MIT rules

Testing

• CI tests executed via GitHub Actions
• License validation and related tests pass

Signed-off-by: Diksha Deware dikshadeware@gmail.com

[dikshaa2909]

The CI failures are due to workflows awaiting maintainer approval
since this PR is from a fork. No functional changes beyond adding
the new license detection rule.

Happy to update if any adjustments are needed.

[AyanSinhaMahapatra]

This is not how required phrases are added, please check other rules for examples. We use curly brackets {{ <required phrase> }} to mark this. All your tests are failing because of this, please run tests locally before you add a PR, or look into the CI failures and fix this after opening a PR.

You are also not using the PR template which asks you to fix the tests etc, check contributing to see what you need to follow

[dikshaa2909]

Thanks for the clarification , I’ve updated the rule to follow existing patterns by using {{ }} markers directly in the license text and removed the incorrect required_phrases usage.
I’ve also updated the PR description to follow the project template and addressed the CI failures. Please let me know if anything else needs adjustment.