🚀 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/checkEnv.js

@@ -0,0 +1,36 @@
+const { spawnSync } = require("child_process");
+
+function run(cmd, args = [], opts = {}) {
+  return spawnSync(cmd, args, {
+    stdio: opts.stdio || "pipe",
+    shell: true
+  });
+}
+
+function checkCommand(cmd, args = ["--version"]) {
+  const result = run(cmd, args);
+  return result.status === 0;
+}
+
+function detectPython() {
+  const candidates = ["python3", "python", "py"];
+  for (let c of candidates) {
+    if (checkCommand(c)) return c;
+  }
+  return null;
+}
+
+function detectPip() {
+  const candidates = ["pip3", "pip", "py -m pip"];
+  for (let c of candidates) {
+    if (checkCommand(c.split(" ")[0])) return c;
+  }
+  return null;
+}
+
+function isSuperClaudeInstalled(pipCmd) {
+  const result = run(pipCmd, ["show", "SuperClaude"]);
+  return result.status === 0;
+}
+
+module.exports = { run, detectPython, detectPip, isSuperClaudeInstalled };