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>

projects/firefox/src/styles.scss

@@ -12,9 +12,16 @@ body {
   height: 600px;
   width: 375px;
 
-  color: #ffffff;
+  color: var(--foreground);
+  font-family: var(--font-sans);
   font-size: 16px;
   background: var(--background);
 
   margin: 0;
 }
+
+// Button styling to match market
+button {
+  text-transform: uppercase;
+  font-family: var(--font-sans);
+}