docs: close developer onboarding implementation and verification

.trellis/tasks/archive/2026-10/10-04-developer-onboarding/task.json

@@ -0,0 +1,26 @@
+{
+  "id": "developer-onboarding",
+  "name": "developer-onboarding",
+  "title": "Dever 开发 skill、新项目模板与统一更新",
+  "description": "实现独立 Dever language skill、可验证新项目模板、dever new，以及沿用共享机器安装的 core/skill 成套更新和安装指引。",
+  "status": "completed",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P2",
+  "creator": "Antigravity",
+  "assignee": "Antigravity",
+  "createdAt": "2026-10-04",
+  "completedAt": "2026-10-04",
+  "branch": "main",
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [],
+  "notes": "",
+  "meta": {}
+}