docs: update pricing to reflect $29/mo Pro tier #7
Description
The Pro tier is now $29/mo (previously listed as $19-29 range or $49). Update any pricing references across the docs.
Pages to check:
getting-started.md— may reference pricing or tier limitsplatform.md— may describe tier features
Correct values:
| Tier | Price | Scaffolds/mo | Images/mo |
|---|---|---|---|
| Free | $0 | 3 | 5 |
| Pro | $29/mo | 50 | 100 |
| Team | $19/seat/mo | 50/seat | Pooled |