Add plannotator extension v0.19.10

extensions/plannotator/skills/plannotator-review/SKILL.md

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+---
+name: plannotator-review
+description: Open Plannotator's browser-based code review UI for the current worktree or a pull request URL, then act on the feedback that comes back.
+---
+
+# Plannotator Review
+
+Use this skill when the user wants to review current code changes in Plannotator instead of reading a diff inline.
+
+Run:
+
+```bash
+plannotator review [optional-pr-url]
+```
+
+Behavior:
+
+1. Launch the command with Bash.
+2. Wait for it to finish.
+3. If it returns feedback or annotations, address them in the same conversation.
+4. If it returns an approval/LGTM-style message, acknowledge that review passed and continue.
+
+Do not ask the user to copy shell commands into chat. Run the command yourself.

extensions/plannotator/skills/plannotator-review/agents/openai.yaml

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+interface:
+  display_name: "Plannotator Review"
+  short_description: "Open Plannotator code review for local changes or a PR."
+policy:
+  allow_implicit_invocation: false