[i-sayankh]

Summary

• Add StartsWith and EndsWith evaluators with type-aware failure messages.
• Register both evaluators in the engine and TUI schema, with reference documentation and tests.

Checks

• Targeted evaluator and schema tests: 17 passed.
• pytest tests/: 847 passed, 20 failed, 4 skipped. Failures are in unrelated Windows/platform/CLI cases, including Terraform-dependent tests.
• Black passed on the changed Python files. A whole-repo Black check reports 13 existing files that would be reformatted.

Closes #380

[refeed]

Lgtm, thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
src/tirith/core/evaluators/__init__.py	100.00% <100.00%> (ø)
src/tirith/core/evaluators/ends_with.py	100.00% <100.00%> (ø)
src/tirith/core/evaluators/starts_with.py	100.00% <100.00%> (ø)
src/tirith/tui/schema.py	100.00% <ø> (ø)

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[refeed]

Thank you so much for this contribution @i-sayankh!💙 We truly value the time and care you put into improving Tirith, and it means a lot to see the community help shape it. If you’re sharing your work on LinkedIn, don’t forget to tag StackGuardian so we can cheer you on! Keep them coming. We’re excited to see what you build next 😇