docs(feature-research/kilo): mirror hooks phrasing for subagents row

[Chen17-sq]

Summary

Addresses item 3 from #1616.

The subagents row in .rulesync/skills/rulesync-feature-research/references/kilo.md previously read:

subagents | https://kilo.ai/docs/customize/custom-subagents | Custom modes/agents; no README-supported Rulesync Kilo subagents target

That phrasing reads as if Rulesync has no support for Kilo subagents at all. In fact, KiloSubagent is registered in src/features/subagents/subagents-processor.ts (import { KiloSubagent } … at line 22, registered at line 184) — what's actually true is that the README's "Supported Tools and Features" table does not yet claim the target for Kilo.

The hooks row on the same file already encodes that exact nuance:

hooks | … | Adapter exists in source, but no README-supported Rulesync Kilo hooks target

This PR reuses that hedged phrasing for the subagents row, so the two parallel cases now read consistently. The Official docs URL is unchanged.

Test plan

• Single-line edit to one map file; no schema or generator changes.
• pnpm cicheck (fmt + oxlint + eslint + tsgo + 5550 vitest + sync-skill-docs check + cspell + secretlint) passes locally on Node 22.
• Pre-commit pnpm dev generate also runs cleanly, so the generated mirrors under .claude/, .opencode/, .github/, .takt/ regenerate without complaint.

Refs #1616 (item 3 of 5 — the other follow-ups in that issue are out of scope here).

[github-actions]

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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 #1616 item 3 — once a slot frees up.