feat: add windows runner CI and release jobs

windows/bundle.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+# Build carrier and bundle the result: carrier.exe plus the GTK runtime
+# into dist/, then dist/ into carrier-windows-<version>.zip.
+#
+# Run from the carrier checkout inside the MSYS2 MINGW64 shell (or with
+# the MINGW64 toolchain on PATH — windows/setup.sh installs the deps,
+# and the forgejo Windows runner host already carries them).
+set -euo pipefail
+
+say() { printf '\n==> %s\n' "$*"; }
+die() { printf '\n!! %s\n' "$*" >&2; exit 1; }
+
+say "building carrier (release; the first build takes a while)"
+cargo build --release --locked || die "cargo build failed"
+
+say "bundling the runtime"
+rm -rf dist
+mkdir -p dist/share/glib-2.0/schemas \
+    dist/share/icons/hicolor/512x512/apps \
+    dist/share/icons/hicolor/256x256/apps \
+    dist/share/icons/hicolor/128x128/apps
+cp target/release/carrier.exe dist/
+for dll in $(ldd target/release/carrier.exe | awk '/mingw64/ {print $3}'); do
+    cp "$dll" dist/ || die "copying $dll failed"
+done
+[ "$(ls dist/*.dll | wc -l)" -gt 0 ] || die "no DLLs collected — ldd found none under /mingw64"
+cp /mingw64/share/glib-2.0/schemas/* dist/share/glib-2.0/schemas/
+glib-compile-schemas dist/share/glib-2.0/schemas/
+cp -r /mingw64/share/icons/Adwaita dist/share/icons/
+cp -r /mingw64/share/icons/hicolor dist/share/icons/
+cp data/icons/com.randogoth.carrier.png     dist/share/icons/hicolor/512x512/apps/
+cp data/icons/com.randogoth.carrier-256.png dist/share/icons/hicolor/256x256/apps/
+cp data/icons/com.randogoth.carrier-128.png dist/share/icons/hicolor/128x128/apps/
+
+say "zipping"
+version=$(sed -n 's/^version = "\(.*\)"$/\1/p' Cargo.toml | head -1)
+rm -f "carrier-windows-$version.zip"
+(cd dist && zip -qr "../carrier-windows-$version.zip" .)