Drop pacman packaging, bakery-only distribution

bakery already fully covers what the PKGBUILD provided (binary, systemd
--user service where applicable, dependency declarations) except a LICENSE
copy, which bakery.toml's new license_file field now closes. Removes
packaging/arch/ and .forgejo/workflows/package.yml; adds the LICENSE
artifact to each release/dev-release/beta-release workflow's prepare
step. Not pacman-installed inside BOS today (BOS already consumes these
apps exclusively via build-local.sh's skel-staging), so this only removes
the option to `pacman -S` outside of BOS/bakery.

.forgejo/workflows/beta-release.yml

@@ -62,6 +62,7 @@ jobs:
               > "${PKG_DIR}/${bin}-x86_64.sha256"
           done
           cp src/packaging/systemd/breadd.service "${PKG_DIR}/"
+          cp src/LICENSE "${PKG_DIR}/"
           cp src/bakery.toml "${PKG_DIR}/bakery.toml"
           ln -sfn "${VERSION}" "/srv/breadway-dl/beta/bread/latest"
 

.forgejo/workflows/dev-release.yml

@@ -61,6 +61,7 @@ jobs:
               > "${PKG_DIR}/${bin}-x86_64.sha256"
           done
           cp src/packaging/systemd/breadd.service "${PKG_DIR}/"
+          cp src/LICENSE "${PKG_DIR}/"
           cp src/bakery.toml "${PKG_DIR}/bakery.toml"
           ln -sfn "${VERSION}" "/srv/breadway-dl/dev/bread/latest"
 

.forgejo/workflows/package.yml

@@ -1,40 +0,0 @@
-name: Build and publish package
-
-on:
-  push:
-    tags: ['v*']
-
-jobs:
-  package:
-    runs-on: [self-hosted, hestia]
-    container:
-      image: archlinux:latest
-    steps:
-      # Note: no actions/checkout — the archlinux image has no Node, which JS
-      # actions require. Everything runs as shell steps and clones manually.
-      - name: Build and publish
-        env:
-          PUBLISH_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
-        run: |
-          set -euo pipefail
-          VERSION="${GITHUB_REF_NAME#v}"
-          pacman -Syu --noconfirm base-devel git rust cargo libgit2 openssl
-          useradd -m builder
-          git config --global --add safe.directory '*'
-          git clone --branch "${GITHUB_REF_NAME}" --depth 1 \
-            "https://git.breadway.dev/${GITHUB_REPOSITORY}.git" /home/builder/src
-          cd /home/builder/src
-          git archive --format=tar.gz --prefix="bread-${VERSION}/" HEAD \
-            > packaging/arch/bread-${VERSION}.tar.gz
-          SHA=$(sha256sum packaging/arch/bread-${VERSION}.tar.gz | awk '{print $1}')
-          sed -i "s/^pkgver=.*/pkgver=${VERSION}/" packaging/arch/PKGBUILD
-          sed -i "s/^sha256sums=.*/sha256sums=('${SHA}')/" packaging/arch/PKGBUILD
-          chown -R builder:builder /home/builder/src
-          # --nocheck: packaging builds the artifact; tests belong in a CI job.
-          su builder -c "cd /home/builder/src/packaging/arch && makepkg -f --noconfirm --nocheck"
-          PKG=$(find /home/builder/src/packaging/arch -name '*.pkg.tar.zst' | head -1)
-          curl -fsS -X PUT \
-            -H "Authorization: token ${PUBLISH_TOKEN}" \
-            -H "Content-Type: application/octet-stream" \
-            --data-binary "@${PKG}" \
-            "https://git.breadway.dev/api/packages/Breadway/arch/os"

.forgejo/workflows/release.yml

@@ -34,6 +34,7 @@ jobs:
               > "${PKG_DIR}/${bin}-x86_64.sha256"
           done
           cp src/packaging/systemd/breadd.service "${PKG_DIR}/"
+          cp src/LICENSE "${PKG_DIR}/"
           cp src/bakery.toml "${PKG_DIR}/bakery.toml"
           ln -sfn "${VERSION}" "/srv/breadway-dl/bread/latest"