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.

packaging/README.md

@@ -5,22 +5,14 @@ This directory contains distribution packaging for Bread.
 
 ```
 packaging/
-├── arch/
-│   └── PKGBUILD          ← Arch Linux package build script
 └── systemd/
     └── breadd.service    ← systemd user service unit
 ```
 
-## Arch Linux
-
-```bash
-cd packaging/arch
-makepkg -si
-```
-
-The PKGBUILD builds both `breadd` and `bread` from source and installs them to `/usr/bin`. It also installs the systemd user service unit to `/usr/lib/systemd/user/`.
-
-Before publishing to the AUR, update `pkgver`, `source`, and `sha256sums` to point at a tagged release tarball.
+Prebuilt binaries are distributed exclusively via `bakery` (see the main
+README) — there is no Arch/pacman package for `bread` anymore. `bakery`
+installs the systemd user service unit itself, matching the `packaging/systemd/breadd.service`
+file here.
 
 ## systemd user service
 

packaging/arch/PKGBUILD

@@ -1,39 +0,0 @@
-# Maintainer: Breadway <plasticbread849@gmail.com>
-
-pkgname=bread
-pkgver=0.6.6
-pkgrel=1
-pkgdesc="A reactive automation fabric for Linux desktops"
-arch=('x86_64')
-url="https://git.breadway.dev/Breadway/bread"
-license=('MIT')
-# mlua builds Lua from vendored C source. makepkg's default -flto=auto would
-# emit GCC LTO bitcode into liblua5.4.a, which the Rust (lld) link can't read,
-# leaving all lua_* symbols undefined. Disable LTO for a clean static link.
-options=(!lto !debug)
-depends=('glibc')
-optdepends=(
-  'libnotify: desktop notifications via bread.notify()'
-  'upower: D-Bus battery events (sysfs polling used otherwise)'
-)
-makedepends=('rust' 'cargo')
-source=("${pkgname}-${pkgver}.tar.gz")
-sha256sums=('SKIP')
-
-build() {
-  cd "${srcdir}/${pkgname}-${pkgver}"
-  cargo build --release --locked
-}
-
-check() {
-  cd "${srcdir}/${pkgname}-${pkgver}"
-  cargo test --release --locked --workspace
-}
-
-package() {
-  cd "${srcdir}/${pkgname}-${pkgver}"
-  install -Dm755 target/release/breadd "${pkgdir}/usr/bin/breadd"
-  install -Dm755 target/release/bread  "${pkgdir}/usr/bin/bread"
-  install -Dm644 packaging/systemd/breadd.service "${pkgdir}/usr/lib/systemd/user/breadd.service"
-  install -Dm644 LICENSE "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
-}

packaging/arch/README.md

@@ -1,28 +0,0 @@
-Arch packaging
-==============
-
-`PKGBUILD` builds and installs both `breadd` and `bread` from source.
-
-## Local build
-
-```bash
-makepkg -si
-```
-
-## Before publishing to AUR
-
-1. Tag a release on GitHub.
-2. Update `pkgver` to match the tag.
-3. Update `source` to the release tarball URL.
-4. Run `updpkgsums` (or manually set `sha256sums`).
-5. Update `url` if the repository has moved.
-6. Set `depends` accurately — at minimum: `glibc`. Add `udev` if not linking statically.
-
-## Runtime dependencies
-
-| Package | Required | Notes |
-|---------|----------|-------|
-| `glibc` | yes | always |
-| `udev` | yes | device events |
-| `dbus` | optional | UPower battery events |
-| `libnotify` | optional | `bread.notify()` (uses `notify-send`) |