Add article: 5 Things That Look Terrible as Plain Text

[ericyewang]

Summary

• Adds a written-content article for Written Content: 5 Things That Look Terrible as Plain Text (And How OpenUI Fixes Them) #5.
• Uses five concrete before/after examples to show where plain text AI output breaks down.
• Frames the OpenUI value around structured, product-shaped outputs: comparisons, analytics, forms, incident reports, and recommendations.

Notes

The article is written in a developer-to-developer style and avoids a product-pitch tone. It links back to the OpenUI GitHub repo, docs, and playground.

Refs #5