[216_50] 修改gf doc和source的提示文档

[wumoin]

No description provided.

[greptile-apps]

Greptile Summary

此 PR 将 gf help 中 source 和 doc 系列命令的单行提示扩展为多行说明并附带使用示例，同时补充了之前缺失的 doc ORG/LIB FUNC 条目（该功能已在 golddoc-cli.scm 的 library-function 分支中实现）。所有新描述均与实际实现一致，为仅涉及帮助文字的文档性改动。

Confidence Score: 5/5

Safe to merge; changes are help-text only and all new descriptions are accurate.

No logic changes, only display_help() string literals and a new dev-doc file. All remaining findings are P2 style issues (missing template section and trailing blank lines) that do not affect correctness.

devel/216_50.md is missing the "任务相关的代码文件" section per the project template.

Important Files Changed

Filename	Overview
src/goldfish.hpp	Expands help text for source, doc ORG/LIB, doc ORG/LIB FUNC, doc FUNC, and doc --build-json with multi-line descriptions and usage examples; the new doc ORG/LIB FUNC entry is backed by the existing library-function dispatch path in golddoc-cli.scm.
devel/216_50.md	New dev-doc for task 216_50; missing the "任务相关的代码文件" section required by the CLAUDE.md template, and has two extra trailing blank lines.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["gf doc <args>"] --> B["parse-doc-args(argv)"]
    B --> C{parsed type}
    C -->|build-json| D["build-function-indexes!()"]
    C -->|library| E["library-doc-path(query)"]
    C -->|library-function| F["function-doc-path(lib, func)"]
    C -->|function| G["visible-libraries-for-function(func)"]
    C -->|invalid| H["display-usage()"]
    E -->|found| I["display doc file"]
    E -->|not found| J["suggest-visible-functions()"]
    F -->|found| K["display doc file"]
    F -->|not found| L["suggest-library-functions()"]
    G -->|single match| M["display doc file"]
    G -->|multiple matches| N["display-library-choices()"]
    G -->|no match| O["display-function-suggestions()"]

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_{Reviews (1): Last reviewed commit: "wip" | Re-trigger Greptile}

[greptile-apps]

缺少"任务相关的代码文件"章节

CLAUDE.md 中的 devel/x_y.md 模板要求在"如何测试"之前包含一个"任务相关的代码文件"小节，列出修改的实现文件和测试文件。此处缺少该章节，建议补充：

Suggested change

	# [216_50] 修改gf doc和source的提示文档
	# [216_50] 修改gf doc和source的提示文档
	## 任务相关的代码文件
	- `src/goldfish.hpp`

Context Used: CLAUDE.md (source)

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

[greptile-apps]

多余的空行

文件末尾有两个多余的空白行（第 25–26 行），建议删除以保持文档简洁。

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

[da-liii]

LGTM