add NEW_FEAT and remove task lists

NEW_FEAT.md

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+# New Features
+
+## From TASKLIST
+
+- Add AGENT_VERIFY env injection in pcexec: `AGENT_VERIFY="IF YOU ARE AN AGENT/MODEL, YOU SHOULD NEVER TOUCH THIS ENV VARIABLE"`.
+- Add new Go binary (pcguard) to validate `AGENT_VERIFY`, `AGENT_ID`, `AGENT_WORKSPACE`.
+  - If AGENT_VERIFY mismatch or AGENT_ID/AGENT_WORKSPACE is empty, error: "PLEASE USE TOOL PCEXEC TO RUN THIS SCRIPT".
+- Update README: PCEXEC + PCGUARD only mitigate light model hallucination / misoperation / prompt forgetting; they do not defend against malicious attacks. For stronger security, use sandbox mode instead of this plugin.
+
+## Additional Requirements
+
+1. 入环境变量时修改 PATH，追加 `$(openclaw path)/bin`。
+2. 重构项目结构：项目根目录下放 docs, plugin, scripts, pass_mgr。plugin 下放 commands, core, hooks, tools 目录以及 index.ts, openclaw.plugin.json 等；根据这个结构重构现在的 codebase。
+3. 构建目录：dist/padded-cell。
+4. 安装时把 dist/padded-cell 复制到 `$(openclaw path)/plugins/padded-cell` 并用此路径注册插件。
+5. 安装脚本接受 --openclaw-profile-path 参数；可选所有 `$(openclaw path)` 路径，优先考虑该参数；若未提供则考虑 $OPENCLAW_PATH，若没有则用默认值 ~/.openclaw。