Bump version and add changelog

Update changelog.json

Co-authored-by: tidy-dev <75402236+tidy-dev@users.noreply.github.com>

Update ci.yml

Release 3.5.4-beta1 with new features and fixes

Bump version to 3.5.4-beta1 and update changelog with new features, improvements, and bug fixes, including PR preview enhancements, commit message options, Copilot support for non-GitHub repos, and UI improvements.

Revert to Electron v36.1.0

Update Electron target version in .npmrc file too 😒

Add changelog for test release

Update validate-electron-version.ts

Update beta Electron version to 38.1.0

Changed the valid Electron version for the beta channel from 36.1.0 to 38.1.0 to reflect the latest release.

Add changelog for test release