🚀 Prepare for dual PyPI/NPM release v4.0

- Fix version consistency (PyPI: 4.0.0, NPM: 4.0.3)
- Update license format to PEP 639 compliance
- Restore NPM package components (bin/ and package.json)
- Fix NPM package name to @superclaude-org/superclaude
- Add comprehensive RELEASE_INSTRUCTIONS.md
- Update .gitignore to include NPM files
- Ready for production release on both PyPI and NPM

Co-Authored-By: Claude <noreply@anthropic.com>

bin/update.js

@@ -0,0 +1,17 @@
+#!/usr/bin/env node
+const { run, detectPip } = require("./checkEnv");
+
+let pipCmd = detectPip();
+if (!pipCmd) {
+  console.error("❌ pip not found, cannot update.");
+  process.exit(1);
+}
+
+console.log("🔄 Updating SuperClaude from PyPI...");
+const result = run(pipCmd, ["install", "--upgrade", "SuperClaude"], { stdio: "inherit" });
+if (result.status !== 0) {
+  console.error("❌ Update failed.");
+  process.exit(1);
+}
+console.log("✅ SuperClaude updated successfully!");
+