Add new static code analysis workflow

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    name: Static code analysis
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Check translation files
+        run: |
+          Human-Connection/scripts/translations/sort.sh
+          Human-Connection/scripts/translations/missing-keys.sh