Update issue templates

.github/ISSUE_TEMPLATE/project-plan--ai-agent-.md

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+---
+name: Project Plan (AI Agent)
+about: A Project Plan is intended primarily to describe this issue to an AI agent.
+  It can also be helpful for a human implementer.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+- [ ] Read the entire project plan carefully before beginning work
+- [ ] Do not stop working until the project plan is entirely completed
+- [ ] Check every checkbox before finishing the project plan
+- [ ] Double-check all of your work and ensure that absolutely everything in this project plan has been completed
+
+# Title
+
+# Description
+
+# Tasks
+
+// These should be checkboxes
+
+# Acceptance Criteria
+
+- [ ] All tasks in the Tasks section have been completed
+- [ ] All work has been double-checked, you are sure that you have completed absolutely everything from this project plan
+- [ ] All affected tests in the `examples` directory have been updated
+- [ ] All affected tests in the `examples` directory are passing
+- [ ] All TypeScript and linting errors are gone
+- [ ] Both stable and experimental templates have been regenerated
+- [ ] All checkboxes in this document are checked