Matrix-js: add parity docs and live harness scripts

extensions/matrix-js/scripts/live-e2ee-bootstrap.ts

@@ -0,0 +1,28 @@
+import { bootstrapMatrixVerification } from "../src/matrix/actions/verification.js";
+import { installLiveHarnessRuntime, resolveLiveHarnessConfig } from "./live-common.js";
+
+async function main() {
+  const recoveryKeyArg = process.argv[2];
+  const forceResetCrossSigning = process.argv.includes("--force-reset-cross-signing");
+
+  const base = resolveLiveHarnessConfig();
+  const pluginCfg = installLiveHarnessRuntime(base);
+  (pluginCfg.channels["matrix-js"] as { encryption: boolean }).encryption = true;
+
+  const result = await bootstrapMatrixVerification({
+    recoveryKey: recoveryKeyArg?.trim() || undefined,
+    forceResetCrossSigning,
+  });
+
+  process.stdout.write(`${JSON.stringify(result, null, 2)}\n`);
+  if (!result.success) {
+    process.exitCode = 1;
+  }
+}
+
+main().catch((err) => {
+  process.stderr.write(
+    `E2EE_BOOTSTRAP_ERROR: ${err instanceof Error ? err.message : String(err)}\n`,
+  );
+  process.exit(1);
+});