Add VERSION_UPDATE_GUIDE.md to document version update process

Author: blink-zero

VERSION_UPDATE_GUIDE.md

@@ -0,0 +1,60 @@
+# Version Update Guide
+
+This document provides a guide on where version numbers need to be updated when releasing a new version of PowerPulse.
+
+## Files to Update
+
+When updating the version of PowerPulse, the following files need to be updated:
+
+1. **Root package.json**
+   - Location: `/package.json`
+   - Update the `"version"` field
+
+2. **Client package.json**
+   - Location: `/client/package.json`
+   - Update the `"version"` field
+
+3. **Server package.json**
+   - Location: `/server/package.json`
+   - Update the `"version"` field
+
+4. **README.md**
+   - Location: `/README.md`
+   - Update the version badge: `![Version](https://img.shields.io/badge/version-X.Y.Z-green)`
+
+## Automatic Version Display
+
+The web UI automatically reads the version from the client's package.json file through the following mechanism:
+
+1. `client/src/config/appConfig.js` imports the version from `client/package.json`
+2. Components like `ApplicationInfo.jsx` and `Footer.jsx` read the version from `appConfig.js`
+
+This means that once you update the version in `client/package.json`, the web UI will automatically display the new version.
+
+## Tests
+
+The test file `client/src/test/example.test.jsx` has been updated to dynamically read the version from `client/package.json` rather than using a hardcoded version number. This ensures that the test will continue to pass when the version is updated.
+
+## CHANGELOG.md
+
+Don't forget to update the CHANGELOG.md file with details about the new version, following the existing format:
+
+```markdown
+## [X.Y.Z] - YYYY-MM-DD
+
+### Added
+- New features
+
+### Changed
+- Changes to existing functionality
+
+### Fixed
+- Bug fixes
+
+### Removed
+- Removed features
+```
+
+## GitHub Release Process
+
+After updating all version numbers and the CHANGELOG.md, commit the changes and push to the appropriate branch (e.g., `release/vX.Y.Z`). Then create a new release on GitHub with the appropriate tag.