feat: publish Gamertan Web Foundations preview source

Export the reviewed application-neutral package set through the exact public allowlist. Development history and private application evidence remain outside this canonical source root.

Developed with material AI assistance under maintainer review.

Signed-off-by: Cole Speelman <crspeelman@gmail.com>

scripts/check-licenses.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: AGPL-3.0-only
+set -euo pipefail
+root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+cd "$root"
+failed=0
+while IFS= read -r -d '' file; do
+	case $file in
+		./.git/*|./LICENSES/*|./go.sum) continue ;;
+		./starters/*|./examples/*) expected=0BSD ;;
+		./scripts/*|./.gitea/*|./services/*) expected=AGPL-3.0-only ;;
+		*) expected=MPL-2.0 ;;
+	esac
+	if ! head -n 5 "$file" | grep -Fq "SPDX-License-Identifier: $expected"; then
+		echo "license mismatch: $file expected $expected" >&2; failed=1
+	fi
+done < <(find . -type f -print0)
+exit "$failed"