feat: add multi-engine regex flavour support

scripts/java-engine-pack.mjs

@@ -41,6 +41,8 @@ export const JAVA_LOCK = Object.freeze({
       "cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30",
     noticeSha256:
       "6c2b3372a6beee7fbaad482248ac0f5ad2b099d92ff2a528c04261cc9c0636f4",
+    packagedNoticeSha256:
+      "71bbe79ff78d0e5e64096acdd418589abfe886b8f827048dc655df438a57e477",
   }),
   toolchain: Object.freeze({
     mavenVersion: "3.9.15",
@@ -282,6 +284,9 @@ async function expectedMetadata(root, pack) {
       license: JAVA_LOCK.source.license,
       upstreamLicenseSha256: JAVA_LOCK.source.licenseSha256,
       upstreamNoticeSha256: JAVA_LOCK.source.noticeSha256,
+      packagedNoticeSha256: JAVA_LOCK.source.packagedNoticeSha256,
+      noticeNormalization:
+        "The packaged notice removes one redundant blank line and adds a final LF; its attribution text is unchanged.",
     },
     toolchain: {
       mavenVersion: JAVA_LOCK.toolchain.mavenVersion,
@@ -418,6 +423,14 @@ export async function verifyJavaPack(packDirectory, root) {
   ) {
     throw new Error("The staged TeaVM licence does not match tag 0.15.0.");
   }
+  if (
+    (await sha256File(path.join(pack, "NOTICE.txt"))) !==
+    JAVA_LOCK.source.packagedNoticeSha256
+  ) {
+    throw new Error(
+      "The staged TeaVM notice does not match the documented normalized notice.",
+    );
+  }
   const moduleText = await readFile(path.join(pack, "java-regex.mjs"), "utf8");
   if (
     moduleText.includes("sourceMappingURL") ||