docs(antigravity): 補齊 action 與 workflow 逐行註解並重建 README #8

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jiantw83 wants to merge 5 commits from ai-review-resolve/develop-20260629-142707 into develop

Author	SHA1	Message	Date
Jeffery	a66eef5490	chore(ci): 移除測試 job 的工具輸出 step CI / Antigravity (pull_request) Failing after 17s Details CI / Release Tag Version (pull_request) Successful in 4s Details	2026-06-29 16:41:21 +08:00
Jeffery	a8b20f4cde	feat(antigravity): 安裝步驟新增 OAuth 空值檢查，缺少時直接失敗	2026-06-29 16:41:21 +08:00
jiantw83andJeffery	3b882b73ce	fix(ci): correct step name from '工具書出' to '工具輸出' in CI workflow CI / Release Tag Version (pull_request) Successful in 3s Details CI / Antigravity (pull_request) Failing after 18s Details	2026-06-29 16:28:30 +08:00
jiantw83andJeffery	b2a34fbec4	feat(ci): add output step to display Antigravity action results	2026-06-29 16:28:30 +08:00
Jeffery	90851de69f	docs(antigravity): 補齊 action 與 workflow 逐行註解並重建 README	2026-06-29 16:28:30 +08:00