Wrap remaining checks endpoints (2 missing of 12)

[ldraney]

Parent Issue

#86 — Expand Octokit coverage

Category: checks

File: src/tools/categories/checks.ts
Current: 10/12

Already Wrapped

listForRef, listForSuite, get, create, update, listSuitesForRef, getSuite, createSuite, rerequestSuite, listAnnotations

Methods to Add (2)

Method	Route
rerequestRun	POST /repos/{owner}/{repo}/check-runs/{check_run_id}/rerequest
setSuitesPreferences	PATCH /repos/{owner}/{repo}/check-suites/preferences

Pattern

See src/tools/categories/git.ts. Tool name: github_checks_<snake_case_method>.

Acceptance Criteria

• Both methods wrapped
• npm run build passes
• TOOLS.md updated