Rebrand to Plebeian Signer with updated colors and UI improvements

- Fix project name from "Plebian" to "Plebeian" throughout codebase
- Replace gooti logo with Plebeian Market logo across all screens
- Update color scheme to match Plebeian Market (pink accent #ff3eb5)
- Add IBM Plex Mono fonts and Reglisse heading font
- Center vault create/import screen content vertically
- Reduce spacing on sync preference screen to prevent scrolling
- Add Enter key support on vault login password field
- Update options page with new logo and color scheme
- Bump version to 0.0.5

Files modified:
- package.json (version bump, name fix)
- projects/*/public/{logo.svg,options.html,manifest.json}
- projects/*/src/app/components/vault-*/*.{html,scss}
- projects/*/src/app/components/welcome/*.html
- projects/common/src/lib/styles/*.scss
- Various component files for branding updates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -1,8 +1,8 @@
-# Plebian Signer
+# Plebeian Signer
 
 ## Nostr Identity Manager & Signer
 
-Plebian Signer is a browser extension for managing multiple [Nostr](https://github.com/nostr-protocol/nostr) identities and for signing events on web apps without having to give them your keys.
+Plebeian Signer is a browser extension for managing multiple [Nostr](https://github.com/nostr-protocol/nostr) identities and for signing events on web apps without having to give them your keys.
 
 It implements these mandatory [NIP-07](https://github.com/nostr-protocol/nips/blob/master/07.md) methods: