feat(skills): add update-setup wizard skill

nanobot/skills/update-setup/SKILL.md

@@ -0,0 +1,83 @@
+---
+name: update-setup
+description: One-time setup wizard for the nanobot upgrade skill. Triggers: setup update, configure update, 切设置更新, 初始化更新.
+---
+
+# Update Setup
+
+Generate a personalized upgrade skill for this workspace.
+
+## Step 1: Check Existing
+
+Use `read_file` to check if `skills/update/SKILL.md` already exists in the workspace.
+
+If it exists, use `ask_user` to ask: "An upgrade skill already exists. Reconfigure?" with options ["yes", "no"]. If no, stop here.
+
+## Step 2: Current Version
+
+Use `exec` to run `nanobot --version`. Tell the user the current version.
+
+## Step 3: Ask Questions
+
+Use `ask_user` three times, one question per call.
+
+**Question 1 — Install method:**
+
+```
+question: "How did you install nanobot?"
+options: ["uv", "pipx", "pip", "source (git clone)"]
+```
+
+**Question 2 — Optional dependencies:**
+
+```
+question: "Which optional dependencies do you need? List names separated by spaces, or reply 'none'. Available: wecom, weixin, msteams, matrix, discord, langsmith, pdf"
+```
+
+Parse the reply. If the user says "none" or similar, set extras to empty. Otherwise collect the valid names.
+
+**Question 3 — Proxy:**
+
+```
+question: "Do you need an HTTP proxy to reach PyPI or GitHub?"
+options: ["no", "yes"]
+```
+
+If yes, ask one more time for the proxy URL: `question: "Enter proxy URL (e.g. http://127.0.0.1:7890):"`.
+
+## Step 4: Generate Skill
+
+Build the extras string. If the user selected dependencies, format as `[dep1,dep2,...]`. Otherwise omit the brackets entirely.
+
+Determine the upgrade command from the install method:
+
+| Method | Command |
+|--------|---------|
+| uv | `uv tool install nanobot-ai[EXTRAS] --force` |
+| pipx | `pipx install nanobot-ai[EXTRAS] --upgrade` |
+| pip | `pip install --upgrade "nanobot-ai[EXTRAS]"` |
+| source | `git pull && uv sync` |
+
+For source installs, ignore extras (uv sync handles them).
+
+Build the skill content. If proxy is configured, add `export http_proxy=URL` and `export https_proxy=URL` lines before the upgrade command.
+
+Use `write_file` to write `skills/update/SKILL.md` with this content:
+
+```
+---
+name: update
+description: "Upgrade nanobot to the latest version. Triggers: upgrade nanobot, update nanobot, 升级nanobot, 更新nanobot."
+---
+
+# Update Nanobot
+
+1. (If proxy configured) Set proxy: `export http_proxy=URL && export https_proxy=URL`
+2. Use `exec` to run the upgrade command: <UPGRADE_COMMAND>
+3. Use `exec` to verify: `nanobot --version`
+4. Tell the user the new version. Say: "Restart nanobot to apply the update."
+```
+
+## Step 5: Confirm
+
+Tell the user: "Upgrade skill created. Say 'upgrade nanobot' when you want to update."