Add CI build for Snap

Signed-off-by: Piper McCorkle <contact@piperswe.me>

.github/workflows/build.yml

@@ -412,5 +412,25 @@ jobs:
         with:
           name: PrismLauncher-${{ runner.os }}-${{ env.VERSION }}-${{ inputs.build_type }}-x86_64.AppImage
           path: PrismLauncher-${{ runner.os }}-${{ env.VERSION }}-${{ inputs.build_type }}-x86_64.AppImage
-
-
+  snap:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+      - name: Set short version
+        shell: bash
+        run: |
+          ver_short=`git rev-parse --short HEAD`
+          echo "VERSION=$ver_short" >> $GITHUB_ENV
+      - name: Package Snap (Linux)
+        id: snapcraft
+        if: runner.os == 'Linux' && matrix.qt_ver != 5
+        uses: snapcore/action-build@v1
+      - name: Upload Snap (Linux)
+        if: runner.os == 'Linux' && matrix.qt_ver != 5
+        uses: actions/upload-artifact@v3
+        with:
+          name: prismlauncher_${{ env.VERSION }}_amd64.snap
+          path: ${{ steps.snapcraft.outputs.snap }}