Add native ReleaseKit bootstrap

scripts/releasekit.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+set -eu
+
+cd "$(dirname "$0")/.."
+
+export GOTOOLCHAIN=local
+export GOWORK=off
+export GOFLAGS=-mod=readonly
+
+GOOS=$(go env GOHOSTOS)
+GOARCH=$(go env GOHOSTARCH)
+export GOOS GOARCH
+
+mkdir -p .releasekit/bin
+go build -mod=readonly -o .releasekit/bin/releasekit \
+	"gitea.maximumdirect.net/eric/ReleaseKit/cmd/releasekit"
+
+exec ./.releasekit/bin/releasekit "$@"