Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3

scripts/run-all.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Regenerates every file in docs/output/. Needs: JDK 21, 25 (LTS), 26 and 27 on disk, Docker with the
+# amazoncorretto:21, :23, :24, :26 and :27 images, and python3. Takes roughly 15-20 minutes, most of it the G1 cost runs.
+#
+# Non-deterministic outputs (timings, RSS, GC counts, the machine's preferred SIMD species) will differ on your
+# machine; the shape should not. Everything else is byte-stable between runs.
+set -uo pipefail
+cd "$(dirname "$0")"
+./g1-default.sh
+./g1-cost.sh
+BATCHES=400 OUTNAME=05-g1-cost-1cpu-short.txt ./g1-cost.sh
+./g1-tuning.sh
+./object-headers.sh
+./jep-tour.sh
+./broken-on-27.sh
+./tls-pq.sh
+./jfr-redaction.sh
+./other-changes.sh
+./recap26.sh
+./api-diff.sh
+./lanes.sh
+./upgrade.sh