feat(zcode-wakatime): add WakaTime plugin for AI coding time tracking

[RoiexLee]

What

Adds zcode-wakatime, a WakaTime plugin for ZCode (Z.ai's agentic coding tool). It registers ZCode lifecycle hooks to trigger wakatime-cli's official AI-activity sync:

• SessionStart — installs/updates wakatime-cli into ~/.wakatime/
• UserPromptSubmit / PostToolUse (edit tools) — runs wakatime-cli --sync-ai-heartbeats, which parses ZCode's own session store (~/.zcode/cli/db/db.sqlite) via the official ZCode parser (pkg/ai/zcode.go, shipped in wakatime-cli v2.26.0) and uploads AI Coding heartbeats (session entities, AI line changes, token counts)

Why

wakatime-cli already parses ZCode sessions, but the AI sync only runs when some wakatime plugin sends a heartbeat. This plugin triggers that sync exactly when ZCode activity happens, so ZCode sessions are tracked even when no other editor is open.

Structure

• .zcode-plugin/plugin.json + hooks/hooks.json + bin/zcode-wakatime.js — single zero-dependency Node script, two-stage detached execution so hooks never block the session
• Derived from wakatime/codex-cli-wakatime (BSD-3-Clause): upstream structure retained verbatim, identity strings adapted for ZCode

Testing

• Windows 11 + ZCode desktop + wakatime-cli v2.26.0
• Real-session verified: hooks fire on SessionStart / UserPromptSubmit / PostToolUse, sync exits 0, zero errors in logs
• Heartbeats confirmed on the WakaTime dashboard (AI Coding category, ZCode sess_* session entities)
• python scripts/validate.py → OK: 17 plugin(s) validated

Version

plugin.json 0.2.0 matches the marketplace entry 0.2.0 (version-sync rule).

License

BSD-3-Clause

Self-check / 自查清单

• Plugin name is unique kebab-case; directory is plugins/<name>/ / 插件名唯一且 kebab-case，目录为 plugins/<name>/
• version bumped in BOTH plugin.json and marketplace.json (artifacts are immutable) / plugin.json 与 marketplace.json 两处版本号已同步升级（制品不可变）
• README.md (EN) and README_CN.md (中文) both updated and equivalent / 中英文 README 均已更新且语义一致
• description_i18n has both en and zh-CN / description_i18n 包含 en 与 zh-CN
• No secrets, machine-specific paths, or private dependencies / 不含密钥、机器专属路径或私有依赖
• Model/API/network dependencies documented / 模型、API、网络依赖已写明
• python3 scripts/validate.py and python3 scripts/build_dist.py pass locally / 本地校验与构建均通过