🚀 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>

Docs/User-Guide/flags.md

@@ -166,7 +166,7 @@
 | `--all-mcp` | Enable all MCP servers | Boolean |
 | `--no-mcp` | Native tools only | Boolean |
 
-### System Flags (SuperClaude CLI)
+### System Flags (SuperClaude Installation)
 | Flag | Purpose | Values |
 |------|---------|--------|
 | `--verbose` / `-v` | Verbose logging | Boolean |