Add script to record expected output

.ruby-version

@@ -0,0 +1 @@
+2.7.4

bin/record_expected_output

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+#! /usr/bin/env sh
+
+export JEKYLL_ENV=production
+export PAGES_REPO_NWO=actions/jekyll-build-pages
+export JEKYLL_BUILD_REVISION=JEKYLL_BUILD_REVISION
+
+for dir in $(ls test_projects)
+do
+	bundle exec github-pages build --verbose -s test_projects/$dir -d test_projects/$dir/_expected
+done