Add resolving findings skill

[QuentinTorg]

Summary

• define the contract for a focused resolving-findings skill
• preserve the original author/reviewer loop while bounding fixer authority to selected findings
• separate local code correction from GitHub, review publication, and lifecycle actions
• add normalized finding intake, risk-based resolution policy, verification and rereview handoff guidance
• add a proportional result template and behavioral evaluation plan

Stack

• base: feat/reviewing-code-skill (PR Redesign reviewing code skill #3)
• this PR: feat/resolving-findings-skill

Verification

• scoped git diff --check -- skills/resolving-findings
• frontmatter parsed as YAML; description is 335 characters
• all relative reference and asset targets verified
• no exact long-line duplication across the package
• trigger and behavioral assertions documented in skills/resolving-findings/evals/evals.md

The repository-wide whitespace check still reports a trailing space in an unrelated pre-existing edit to skills/addressing-review-feedback/SKILL.md; this branch does not include or modify that work.