Add Copilot release instructions for version bump PRs

.github/copilot-instructions.md

@@ -0,0 +1,26 @@
+# Copilot Instructions
+
+## Release update requirements
+
+When preparing a release PR / commit, always follow the established repository pattern:
+
+1. The release commit message must be exactly in this format:
+   - `[Release] Increase version to xxx`
+2. Update all required version files:
+   - `/package.json`
+   - `/core/package.json`
+3. Update `/README.md`:
+   - Bump the **Recommended Version Specification** to the new release version.
+4. Update `/CHANGELIST.md`:
+   - Include only significant changes in the versioned section.
+   - Include a **Full Changelog** comparison link for the release.
+   - If there are `# Unreleased` items, preserve them as-is and do not remove or reduce them when creating the new version section.
+
+## Verified release pattern in this repository
+
+Recent release commits follow this approach and include these files:
+
+- `[Release] Increase version to 0.1.4` (`f3c204d`)
+- `[Release] Increase version to 0.1.3` (`d9340b7`)
+
+These release commits updated release metadata including `CHANGELIST.md`, `README.md`, and package version files.