Add extension metadata and screenshots for LNbits UI (#46)

* Add extension metadata and screenshots for LNbits UI

- Update description.md with comprehensive explanation of relay multiplexer
- Add screenshots array to config.json pointing to 1.jpeg and 2.jpeg
- Change short_description to "Nostr relay multiplexer" for clarity
- Create extensions.json with nostrclient-dev entries for testing
- Add CLAUDE.md for future Claude Code instances

Fixes #41

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Co-Authored-By: Claude <noreply@anthropic.com>

* Change extension name to 'Nostr Client Dev'

Rename extension from 'Nostr Client' to 'Nostr Client Dev' to distinguish from the official extension.

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Co-Authored-By: Claude <noreply@anthropic.com>

* FIX: Ensure valid json

Wrap extensions array in object with "featured" and "extensions" keys to match LNbits Manifest format. This fixes the "1 validation error for Manifest" issue.

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Co-Authored-By: Claude <noreply@anthropic.com>

* Update config.json format for LNbits UI display

- Change name to "Nostr Client Dev" to match extensions.json
- Replace "screenshots" with "images" array using proper format
- Add "description_md" URL for full description display

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Co-Authored-By: Claude <noreply@anthropic.com>

* Crop screenshot 1 to match height of screenshot 2

Crop bottom of 1.jpeg to make both screenshots the same height (1557px) for consistent display in LNbits UI.

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Co-Authored-By: Claude <noreply@anthropic.com>

* Remove headings from description.md

Remove markdown headings for cleaner display in LNbits extension UI.

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Co-Authored-By: Claude <noreply@anthropic.com>

* Change name back to 'Nostr Client' in config.json

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Co-Authored-By: Claude <noreply@anthropic.com>

* Delete CLAUDE.md

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>

description.md

@@ -1 +1,8 @@
-An always-on extension that can open multiple connections to nostr relays and act as a multiplexer for other clients: You open a single websocket to nostrclient which then sends the data to multiple relays. The responses from these relays are then sent back to the client.
+An always-on relay multiplexer that simplifies connecting to multiple Nostr relays.
+
+Instead of your Nostr client managing connections to dozens of relays, you connect to a single WebSocket endpoint provided by `nostrclient`, which then fans out your requests to all configured relays and aggregates the responses back to you.
+
+- **Simplified Client Configuration** - Connect to one endpoint instead of managing multiple relay connections
+- **Always-On Connectivity** - Your LNbits instance maintains persistent connections to relays
+- **Resource Efficient** - Share relay connections across multiple clients
+- **Automatic Subscription Management** - Subscription ID rewriting prevents conflicts between clients