docs: list NIP titles

[tcheeric]

Why now?

The supported NIP list only referenced numbers, making it hard to identify each proposal.
Related issue: #000

What changed?

• Show each supported NIP's title alongside its number in the README.

BREAKING

• n/a

Review focus

• Accuracy of the NIP titles and links.

Checklist

• Scope ≤ 300 lines (or split/stack)
• Title is verb + object (e.g., “Refactor auth middleware to async”)
• Description links the issue and answers “why now?”
• BREAKING flagged if needed
• Tests/docs updated (if relevant)

---

https://chatgpt.com/codex/tasks/task_b_68a728bc78a88331851aa6c901ed06e5

[Copilot]

Pull Request Overview

This PR enhances the README documentation by adding descriptive titles alongside NIP numbers in the supported NIPs list, making it easier for developers to understand what each proposal covers without needing to follow individual links.

Key Changes

• Added descriptive titles for all 23 supported NIPs in the README
• Maintained existing link structure while improving readability

[Copilot]

The title should be 'Nostr Marketplace (for peer-to-peer marketplaces)' to match the official NIP-15 title format which includes the descriptive parenthetical.

Suggested change

	- [NIP-15](https://github.com/nostr-protocol/nips/blob/master/15.md) - Nostr Marketplace
	- [NIP-15](https://github.com/nostr-protocol/nips/blob/master/15.md) - Nostr Marketplace (for peer-to-peer marketplaces)

[Copilot]

The title should be 'Nut Zaps' (two words) to match the official NIP-61 title format.

Suggested change

	- [NIP-61](https://github.com/nostr-protocol/nips/blob/master/61.md) - Nutzaps
	- [NIP-61](https://github.com/nostr-protocol/nips/blob/master/61.md) - Nut Zaps

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