Team Mode Setup only works with Claude

### Problem

Actually the Team Mode initialisation can only be used with Claude CLI, because of hardcoded Claude variables and hooks. At least these supported CLIs have a Hook system too:

- Codex: https://developers.openai.com/codex/hooks
- Cursor: https://cursor.com/docs/hooks
- Factory: https://docs.factory.ai/cli/configuration/hooks-guide
- Kiro: https://kiro.dev/docs/hooks/

### Current behaviour

Team Init cannot be used between Claude and other CLI environments or purely non Claude CLI environments.

### Suggested fix

Implement a ./setup --team --host "cli environment" like for the main installation of gstack.

### Environment

Codex CLI (terminal)
Team Init Initialization
Observed on macOS