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/public/manifest.json

@@ -1,8 +1,8 @@
 {
   "manifest_version": 3,
-  "name": "Plebian Signer",
+  "name": "Plebeian Signer",
   "description": "Nostr Identity Manager & Signer",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "homepage_url": "https://git.mleku.dev/mleku/plebeian-signer",
   "options_page": "options.html",
   "permissions": [
@@ -10,7 +10,14 @@
   ],
   "action": {
     "default_popup": "index.html",
-    "default_icon": "gooti-with-bg.png"
+    "default_icon": {
+      "48": "icon-48.png",
+      "128": "icon-128.png"
+    }
+  },
+  "icons": {
+    "48": "icon-48.png",
+    "128": "icon-128.png"
   },
   "background": {
     "scripts": [