feat: Add snap support (#23)

* WIP: snapcraft config

* chore: tidy up snap workflow

* fix: update ld_library_path

* fix the version of the snap

This uses a combination of most recent git tag and short rev.

* Add git as a build package

Required because we have a dump plugin and a nill plugin which pull in next to nothing. Making it hard to do a version stamp without the git command

.github/workflows/test-snap-builds.yml

@@ -0,0 +1,38 @@
+name: 🧪 Test snap builds on x86_64
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Build snap
+        uses: snapcore/action-build@v1
+        id: snapcraft
+
+      - name: Show log on build failure
+        if: ${{ failure() }}
+        run: |
+          cat /home/runner/.local/state/snapcraft/log/snapcraft*.log
+          exit 1
+
+      - name: Review snap
+        uses: diddlesnaps/snapcraft-review-action@v1
+        with:
+          snap: ${{ steps.snapcraft.outputs.snap }}
+          isClassic: 'false'
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: 'snap'
+          path: ${{ steps.snapcraft.outputs.snap}}