Actions: Unify coding style (#120)

.github/workflows/ci.yml

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+name: CI
+
+on: [pull_request]
+
+jobs:
+  flatpak:
+    name: Flatpak
+    runs-on: ubuntu-22.04
+
+    strategy:
+      matrix:
+        arch: [x86_64, aarch64]
+      # Don't fail the whole workflow if one architecture fails
+      fail-fast: false
+
+    container:
+      image: ghcr.io/elementary/flatpak-platform/runtime:7.2-${{ matrix.arch }}
+      options: --privileged
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU for aarch64 emulation
+        if: ${{ matrix.arch != 'x86_64' }}
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm64
+
+      - name: Build
+        uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+        with:
+          bundle: spreadsheet.flatpak
+          manifest-path: com.github.elework.spreadsheet.yml
+          run-tests: true
+          repository-name: appcenter
+          repository-url: https://flatpak.elementary.io/repo.flatpakrepo
+          cache-key: "flatpak-builder-${{ github.sha }}"
+          arch: ${{ matrix.arch }}
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-22.04
+
+    container:
+      image: valalang/lint
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Lint
+        run: io.elementary.vala-lint -d .

.github/workflows/gettext.yml

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+name: Gettext updates
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  gettext_flatpak:
+    name: Gettext Flatpak
+    runs-on: ubuntu-latest
+
+    container:
+      image: ghcr.io/elementary/flatpak-platform/runtime:7.2-x86_64
+      options: --privileged
+
+    steps:
+    - name: Install git, python3-git and jq
+      run: |
+        apt-get update
+        apt-get install git jq python3-git -y
+
+    - name: Clone repository
+      uses: actions/checkout@v4
+      with:
+        token: ${{ secrets.GIT_USER_TOKEN }}
+
+    - name: Configure Git
+      run: |
+        git config --global --add safe.directory "$GITHUB_WORKSPACE"
+
+    - uses: elementary/actions/gettext-flatpak@main
+      with:
+        manifest-path: 'com.github.elework.spreadsheet.yml'