On the relay docs and quickstart tweak

[khaliqgant]

• Quickstart first run experience was poor

Before

➜  quickstart git:(main) ✗ npx tsx agent.ts
Planner → : 
system → Planner: Collaborate with Coder and Reviewer to implement feature ID 7.

After

➜  quickstart git:(main) ✗ npx tsx agent.ts
system → Planner: Collaborate with Coder and Reviewer to implement feature ID 7.
Planner → #general: Hey team! I've been asked to coordinate implementation of Feature ID 7. Since there's no formal backlog, here's what I'm proposing:

**Feature ID 7: Greeting CLI Tool**

A simple TypeScript CLI utility (`greet.ts`) that:
1. Accepts a `--name` argument (defaults to "World")
2. Accepts a `--format` argument (`plain` or `json`, defaults to `plain`)
3. Outputs a greeting in the chosen format

**Plan:**
- @Coder — Implement `greet.ts` with argument parsing and both output formats. Keep it dependency-free (just use `process.argv`).
- @Reviewer — Once Coder shares the implementation, review it for correctness, edge cases, and code quality.

I'll send each of you detailed instructions via DM now.

• add in on the relay docs and confirm as working with .agentignore and .agentreadonly

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[github-actions]

Preview deployed!

Environment	URL
Web	https://pr-694.agentrelay.net

This preview will be cleaned up when the PR is merged or closed.