docs(file-formats): align claudecode skill paths/scheduled-task order with code emission

[Chen17-sq]

Summary

Addresses item 4 from #1618 (review findings for PR #1604, the Claude Code skills paths field).

ClaudecodeSkill.toRulesyncSkill emits the claudecode section in this order:

// src/features/skills/claudecode-skill.ts:122-130
const claudecodeSection = {
  ...(frontmatter["allowed-tools"] && { ... }),
  ...(frontmatter.model && { model: frontmatter.model }),
  ...(frontmatter["disable-model-invocation"] !== undefined && { ... }),
  ...(frontmatter.paths !== undefined && { paths: frontmatter.paths }),               // ← paths
  ...(this.relativeDirPath === CLAUDE_SCHEDULED_TASKS_DIR_PATH && { "scheduled-task": true }), // ← scheduled-task
};

Object spread order determines the YAML key order in serialized output, so generated skill files put paths before scheduled-task. But docs/reference/file-formats.md had them swapped (scheduled-task then paths), which made the example diverge from the actual generated output users see in their working tree.

This PR moves the paths: block in the doc example up so the YAML key order matches the spread order in code. No code change, no schema change, no URL change.

skills/rulesync/file-formats.md is auto-regenerated from docs/ by scripts/sync-skill-docs.ts (wired through lint-staged on every docs/**/*.md commit) and is included in this PR for that reason.

Test plan

• pnpm cicheck (fmt + oxlint + eslint + tsgo + 5550 vitest + sync-skill-docs check + cspell + secretlint) passes locally on Node 22.
• Diff is a single key reorder in docs/reference/file-formats.md plus the mirrored regeneration in skills/rulesync/file-formats.md.

Refs #1618 (item 4 of 6 — the other follow-ups in that issue are out of scope here).

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[Chen17-sq]

Closing this proactively — the github-actions bot flagged that I'm well over the 2-PR limit for external contributors documented in CONTRIBUTING.md. I opened these nine PRs in one batch without spotting that rule first, which was my mistake — sorry for the noise.

The patch in this PR is ready as-is (pnpm cicheck green, lint-staged green, pre-commit pnpm dev generate green) and stays small enough for a quick read; reopening is one click.

Keeping #1643 (refactor(utils): consolidate isPlainObject, addresses #1638) and #1644 (refactor(copilot-rule): reuse toPosixPath, addresses #1603) as my current two. I'll reopen this one — addressing #1618 item 4 — once a slot frees up.