📝 docs(tsl): align README with syntax skill, restructure roadmap as part-3

- rewrite part-1 to reflect tsl-syntax-reference skill (lookup retrieval, layered table, dual-skill routing)
- fix fabricated section ID in README and SKILL.md examples (verified via --section)
- trim block-identity table, api-reference counts, and stale compare-phrasing
- promote roadmap to standalone part-3 with four directions incl. Agent Loop (planned)
- add deployment section (per-agent skills dirs) and AGENT_PRIMER.md primer

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

skills/tsl-syntax-reference/SKILL.md

@@ -29,7 +29,7 @@ python <this-skill-dir>/scripts/lookup.py --query "数组下标" --mode explain
 `--query` 输出候选后，必须执行下面这种精确取回：
 
 ```bash
-python <this-skill-dir>/scripts/lookup.py --section "05_functions_and_calls--可直接照写示例--基础函数-过程骨架"
+python <this-skill-dir>/scripts/lookup.py --section "05_functions_and_calls--可直接照写示例--默认参数"
 ```
 
 只有 `--section` 返回的章节正文可作为本次任务的语法事实来源；候选摘要和概念地图都不能直接支持代码结论。需要补充时改进查询词再次检索，不得绕过 lookup 手工打开或挑选 `references/` 页面。