docs: update

roadmap.md

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+# Roadmap
+
+## Shell Integrations
+
+- ✅: Working
+- ⚠️: Partial working
+- ❌: Not implemented / Cannot implement
+
+| Feature           | Bash | Zsh | Fish | Nush | Pwsh   |
+|-------------------|------|-----|------|------|--------|
+| Get other alias   | ✅   | ✅  | ✅   | ✅   | ❌     |
+| Command not found | ✅   | ✅  | ✅   | ❌   | ⚠️ [^1] |
+
+[^1]: Cannot retrieve arguments.
+
+## Features Pending Implementation
+
+- Chained commands (e.g. `echo "1\n2" | grepp "2"`)