build(release): add darwin-x64 (Intel Mac) target

Add macos-13 runner for native x86_64 OTP release builds.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: matteing

.github/workflows/release.yml

@@ -40,6 +40,9 @@ jobs:
           - runner: macos-14
             target: darwin-arm64
             tarball: opal-server-darwin-arm64.tar.gz
+          - runner: macos-15-intel
+            target: darwin-x64
+            tarball: opal-server-darwin-x64.tar.gz
           - runner: ubuntu-latest
             target: linux-x64
             tarball: opal-server-linux-x64.tar.gz
@@ -138,6 +141,7 @@ jobs:
           # OTP release tarballs
           mkdir -p cli/releases
           cp artifacts/opal-server-darwin-arm64.tar.gz/opal-server-darwin-arm64.tar.gz cli/releases/
+          cp artifacts/opal-server-darwin-x64.tar.gz/opal-server-darwin-x64.tar.gz     cli/releases/
           cp artifacts/opal-server-linux-x64.tar.gz/opal-server-linux-x64.tar.gz       cli/releases/
           cp artifacts/opal-server-linux-arm64.tar.gz/opal-server-linux-arm64.tar.gz   cli/releases/
           cp artifacts/opal-server-win32-x64.tar.gz/opal-server-win32-x64.tar.gz       cli/releases/
@@ -167,6 +171,7 @@ jobs:
           tag_name: v${{ needs.prepare.outputs.version }}
           files: |
             artifacts/opal-server-darwin-arm64.tar.gz/*
+            artifacts/opal-server-darwin-x64.tar.gz/*
             artifacts/opal-server-linux-x64.tar.gz/*
             artifacts/opal-server-linux-arm64.tar.gz/*
             artifacts/opal-server-win32-x64.tar.gz/*

cli/scripts/postinstall.js

@@ -15,6 +15,7 @@ import { fileURLToPath } from "node:url";
 
 const PLATFORM_MAP = {
   "darwin-arm64": "opal-server-darwin-arm64.tar.gz",
+  "darwin-x64": "opal-server-darwin-x64.tar.gz",
   "linux-x64": "opal-server-linux-x64.tar.gz",
   "linux-arm64": "opal-server-linux-arm64.tar.gz",
   "win32-x64": "opal-server-win32-x64.tar.gz",