making the download button useful

oooo already had a place for a download icon, but the icon did not know whether a new download existed. I added a small request to the website and semantic-version comparison so the plugin can tell when the latest stable release is newer than itself.

Pre-releases and malformed version tags are ignored. When there is an update, the interface offers a route to the downloads page. There is no popup and it does not try to update itself during a session; I only wanted the icon to answer one question correctly.

getting the right installer

The website now syncs release assets from GitHub and groups them by platform and architecture. I also added Linux builds and separate macOS packages for Intel and Apple silicon, which made the update indicator much more useful but also gave it more files to point toward.

The complete path is now: notice that a stable update exists, open the downloads page, and choose the installer for the computer in front of you. This is ordinary software behavior, but oooo did not have it before.