Initial commit: SynOS public documentation

- Add comprehensive README.md
- Add FEATURES.md showcase
- Add Substack article (Introducing SynOS)
- Add ROADMAP.md
- Add LICENSE (CC BY-SA 4.0)
- Set up directory structure

🤖 Generated with Claude Code
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,28 @@
+# Secrets
+.env
+.env.*
+*.key
+*.pem
+*_secret*
+*_private*
+credentials*
+
+# Build artifacts
+*.iso
+*.img
+build/
+dist/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temp
+*.tmp
+*.bak
+*~