Automatically open a PR to bump the calver (#4167)

* 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.

.github/workflows/translations-pr.yml

@@ -31,6 +31,7 @@ jobs:
         uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e #v7.0.8
         with:
           token: ${{ secrets.ELEMENT_BOT_TOKEN }}
+          author: ElementRobot <releases@riot.im>
           commit-message: Translations update
           title: Translations update
           body: |