Try to automatically create swift pm dependency update prs

.github/workflows/xcode-swift-dependencies.yaml

@@ -0,0 +1,36 @@
+name: Xcode Dependencies
+
+on: 
+  schedule:
+    - cron: '17 13 * * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependencies:
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Resolve Dependencies
+        id: resolution
+        uses: GetSidetrack/action-xcodeproj-spm-update@main
+        with:
+          forceResolution: true
+          failWhenOutdated: false
+          directory: 'Monal'
+          workspace: 'Monal/Monal.xcworkspace'
+          scheme: 'Monal Alpha'
+
+      - name: Create Pull Request
+        if: steps.resolution.outputs.dependenciesChanged == 'true'
+        uses: peter-evans/create-pull-request@v3
+        with:
+          branch: 'dependencies/ios'
+          delete-branch: true
+          commit-message: 'Update Xcode Dependencies'
+          title: 'Updated Xcode Dependencies'