feat(docker): add Dockerfile for Arch Linux package build and CI workflow for automated packaging

.gitea/workflows/arch-package.yml

@@ -0,0 +1,28 @@
+name: Arch Linux Package
+
+on:
+  push:
+    tags:
+      - "*"
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: https://git.quad4.io/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        with:
+          fetch-depth: 0
+
+      - name: Build Arch Package
+        run: |
+          docker build -t arch-builder -f Dockerfile.arch-builder .
+          docker run --rm -v $(pwd):/home/build/project arch-builder
+
+      - name: Upload Artifact
+        uses: https://git.quad4.io/actions/upload-artifact@ff15f0306b3f739f7b6fd43fb5d26cd321bd4de5 # v3.2.1
+        with:
+          name: arch-package
+          path: packaging/arch/*.pkg.tar.zst
+