Add MIT rule variant with attribution and no-endorsement clause

[dikshaa2909]

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

The rule preserves the standard MIT license expression while ensuring accurate
detection of the additional conditions present in the license text.

Fixes #4710

[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