Add renderer boundary automation guard

scripts/automation/check-renderer-boundary.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env sh
+set -u
+
+script_dir="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
+root="${1:-$(CDPATH= cd -- "$script_dir/../.." && pwd)}"
+start="$(date +%s)"
+tmp="${TMPDIR:-/tmp}/panopainter-renderer-boundary-$$.txt"
+
+find "$root/src" -type f \( -name '*.c' -o -name '*.cc' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp' \) | while IFS= read -r file; do
+    rel="${file#"$root"/}"
+    case "$rel" in
+        src/renderer_gl/*|src/rtt.cpp|src/texture.cpp)
+            continue
+            ;;
+    esac
+    awk -v rel="$rel" '
+        /^[[:space:]]*\/\// { next }
+        match($0, /\<(GL|WGL)_[A-Z0-9_]+\>/) {
+            print rel ":" FNR ":" substr($0, RSTART, RLENGTH)
+        }
+    ' "$file"
+done > "$tmp"
+
+count="$(wc -l < "$tmp" | tr -d '[:space:]')"
+end="$(date +%s)"
+elapsed_ms="$(( (end - start) * 1000 ))"
+exit_code="0"
+if [ "$count" -ne 0 ]; then
+    exit_code="1"
+fi
+
+printf '{"command":"check-renderer-boundary","exitCode":%s,"violationCount":%s,"elapsedMs":%s}\n' "$exit_code" "$count" "$elapsed_ms"
+rm -f "$tmp"
+exit "$exit_code"