Add Linux arm64 build (#752)

Closes #745

---------

Co-authored-by: Evan Simkowitz <esimkowitz@users.noreply.github.com>

.github/workflows/build-helper.yml

@@ -16,6 +16,10 @@ jobs:
                       arch: "amd64"
                       runner: "ubuntu-latest"
                       scripthaus: "build-package-linux"
+                    - platform: "linux"
+                      arch: "arm64"
+                      runner: ubuntu-24.04-arm64-16core
+                      scripthaus: "build-package-linux"
         runs-on: ${{ matrix.runner }}
         steps:
             - uses: actions/checkout@v4
@@ -28,6 +32,8 @@ jobs:
               run: |
                   sudo apt-get update
                   sudo apt-get install --no-install-recommends -y libarchive-tools libopenjp2-tools rpm
+            - name: Install FPM # The version of FPM that comes bundled with electron-builder doesn't include a Linux ARM target. Installing Gems onto the runner is super quick so we'll just do this for all targets.
+              run: sudo gem install fpm
             - uses: actions/setup-go@v5
               with:
                   go-version: ${{env.GO_VERSION}}