* Allow the AppIconBanner tool to be called with purely the build number.
And use that for the Element Pro Nightly.
* Use a build setting to determine Nightly builds.
* Update our tools package to Swift 6.1
Also improves the package layout with subdirectories 📁
* Update GenerateSDKMocks to be an Async command.
* Add a tool to bump the project CalVer every month.
* Add a workflow to automatically bump the calendar version.
Note: This only does year & month, the patch is handled by the release script.